INSTRUCTIONS TO CANDIDATES

• Read the instructions for each part of the paper carefully.
• Answer ALL the questions.
• You must complete the answer sheet within the time limit.
• At the end of the test, hand in both this question paper and your answer sheet.

INFORMATION FOR CANDIDATES

• There are 40 questions in this test.
• Each question carries one mark.
• The test consists of three sections.

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SECTION 1: Questions 1–13

Read the passage below and answer Questions 1–13.

The History and Science of Chocolate

A Few foods have captured human fascination as thoroughly as chocolate. Today consumed worldwide in countless forms, chocolate originated in the tropical rainforests of Central America, where ancient civilisations first discovered the remarkable properties of cacao beans. The journey from bitter ceremonial beverage to ubiquitous confection spans millennia and continents, involving complex chemical transformations, colonial exploitation, and industrial innovation. Understanding chocolate's history reveals not only changing tastes and technologies but also broader patterns of cultural exchange and economic development that have shaped the modern world.

B Archaeological evidence indicates that humans have consumed cacao for at least 4,000 years. The Olmec civilisation of present-day Mexico appears to have been the first to cultivate cacao trees and process their seeds, though the perishable nature of chocolate beverages limits direct archaeological evidence. The Maya civilisation subsequently developed elaborate cacao cultivation and preparation techniques, producing a frothy, bitter drink typically flavoured with chilli peppers, vanilla, or honey. Cacao held profound religious and social significance for the Maya, featuring prominently in ceremonies, marriages, and burials. The Aztec empire later adopted cacao culture, valuing the beans so highly that they served as currency throughout Mesoamerica. The Aztec emperor Montezuma reportedly consumed fifty cups of chocolate daily, believing the drink conferred wisdom and vitality.

C Spanish conquistadors encountered chocolate upon arriving in the Americas during the early sixteenth century. Initial European reactions ranged from disgust at the bitter, unfamiliar beverage to enthusiastic adoption by those who acquired a taste for it. Spanish colonists soon began modifying the drink to suit European palates, adding cane sugar and removing chilli peppers while retaining flavourings like vanilla and cinnamon. Chocolate reached the Spanish court around 1544 and gradually spread to other European countries over the following century. However, expensive imported ingredients and labour-intensive preparation methods restricted chocolate consumption to aristocratic elites for nearly three hundred years after European contact.

D The transformation of chocolate from luxury beverage to mass-market commodity required several technological innovations during the nineteenth century. In 1828, Dutch chemist Coenraad van Houten patented a hydraulic press that efficiently separated cocoa butter from cocoa solids, producing a powder that dissolved more easily in liquid. This "Dutch process" also treated cocoa with alkaline salts, reducing bitterness and darkening colour. The separated cocoa butter enabled an even more significant innovation: solid eating chocolate. In 1847, English company J.S. Fry & Sons combined cocoa powder, sugar, and melted cocoa butter to create the first modern chocolate bar. Swiss manufacturers subsequently developed milk chocolate in the 1870s and conching—a prolonged mixing process that creates smooth texture—shortly thereafter.

E The chemistry underlying chocolate's appeal involves hundreds of compounds interacting in complex ways. Cacao beans contain approximately fifty percent fat in the form of cocoa butter, which melts just below human body temperature, creating the characteristic sensation of chocolate dissolving on the tongue. Theobromine, a mild stimulant related to caffeine, contributes to chocolate's mood-enhancing effects, though in lower concentrations than commonly believed. The fermentation and roasting processes that transform raw cacao into chocolate generate numerous flavour compounds through Maillard reactions—the same chemical processes responsible for the appealing flavours of roasted coffee, baked bread, and grilled meat. Over six hundred distinct flavour compounds have been identified in chocolate, explaining its remarkable complexity.

F Contemporary chocolate production has achieved unprecedented scale while generating significant ethical and environmental concerns. Global cacao production exceeds five million tonnes annually, with West African countries—particularly Côte d'Ivoire and Ghana—supplying approximately seventy percent of world demand. However, cacao farming remains plagued by poverty, with many farmers earning below subsistence wages despite the multi-billion-dollar industry their labour supports. Child labour and even forced labour persist in some cacao-growing regions, prompting consumer advocacy campaigns and industry certification programmes of varying effectiveness. Environmental concerns include deforestation driven by expanding cacao cultivation, pesticide use, and the carbon footprint of global supply chains.

G The future of chocolate faces challenges from both supply and demand perspectives. Climate change threatens cacao production, as the trees require specific temperature and humidity conditions found only in narrow tropical bands. Rising global temperatures may render current growing regions unsuitable within decades, potentially reducing production by up to forty percent according to some projections. Simultaneously, growing middle-class populations in developing countries are increasing chocolate demand, potentially outpacing supply capacity. Research efforts are exploring heat-tolerant cacao varieties, alternative growing locations, and even laboratory-produced chocolate that bypasses traditional agriculture entirely. Whether these innovations can sustain chocolate availability and affordability for future generations remains uncertain.

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Questions 1–4

Choose the correct letter, A, B, C or D.

Write the correct letter in boxes 1–4 on your answer sheet.

1 According to the passage, the Maya used cacao {{ANSWER:1}}

A      primarily as a form of money.

B      in religious and social ceremonies.

C      only for medicinal purposes.

D      to trade with European merchants.

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2 When chocolate first arrived in Europe, it was {{ANSWER:2}}

A      immediately popular among all social classes.

B      primarily consumed by wealthy aristocrats.

C      rejected entirely by European consumers.

D      cheaper than it had been in the Americas.

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3 Coenraad van Houten's invention {{ANSWER:3}}

A      created the first chocolate bar.

B      separated cocoa butter from cocoa solids.

C      developed milk chocolate.

D      invented the conching process.

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4 The passage states that cocoa butter {{ANSWER:4}}

A      contains high levels of caffeine.

B      melts at a temperature close to human body temperature.

C      was first used by the Aztecs.

D      is produced only in West Africa.

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Questions 5–9

Do the following statements agree with the information given in the passage?

In boxes 5–9 on your answer sheet, write

5 The Olmec civilisation was the first to process cacao seeds. {{ANSWER:5}}

6 Spanish colonists added chilli peppers to chocolate to improve its taste. {{ANSWER:6}}

7 The first modern chocolate bar was created by a Swiss company. {{ANSWER:7}}

8 Over six hundred flavour compounds have been found in chocolate. {{ANSWER:8}}

9 All chocolate certification programmes have successfully eliminated child labour. {{ANSWER:9}}

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Questions 10–13

The passage has seven paragraphs, A–G.

Which paragraph contains the following information?

Write the correct letter, A–G, in boxes 10–13 on your answer sheet.

10 the chemical reasons why chocolate tastes appealing {{ANSWER:10}}

11 concerns about the impact of rising temperatures on cacao growing {{ANSWER:11}}

12 how the Aztecs used cacao beans as a form of payment {{ANSWER:12}}

13 nineteenth-century developments that made chocolate more widely available {{ANSWER:13}}

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SECTION 2: Questions 14–26

Read the passage below and answer Questions 14–26.

Microplastics: An Invisible Environmental Crisis

A Plastic pollution has emerged as one of the defining environmental challenges of the twenty-first century. While large plastic debris attracts considerable public attention—images of marine animals entangled in discarded fishing nets or sea turtles consuming plastic bags have become iconic symbols of environmental damage—a less visible but potentially more insidious form of plastic pollution has increasingly concerned scientists. Microplastics, typically defined as plastic particles smaller than five millimetres in diameter, have now been detected in virtually every environment on Earth, from Arctic sea ice to deep ocean sediments, from mountain peaks to urban air. Their ubiquity, persistence, and potential biological effects make microplastics a priority concern for environmental researchers and policymakers alike.

B Microplastics originate from two primary sources. Primary microplastics are manufactured at small sizes for specific applications, including the microbeads once common in personal care products such as facial scrubs and toothpastes, industrial abrasives used in cleaning processes, and plastic pellets that serve as raw materials for manufacturing. Secondary microplastics result from the degradation of larger plastic items through physical, chemical, and biological processes. Ultraviolet radiation from sunlight breaks chemical bonds in plastic polymers, while wave action, temperature fluctuations, and mechanical abrasion fragment weakened materials into progressively smaller pieces. Synthetic textiles release microscopic fibres during washing, with a single laundry load potentially releasing hundreds of thousands of particles into wastewater systems.

C The environmental distribution of microplastics reflects both their diverse sources and remarkable transport capacity. Rivers carry land-based plastic pollution to oceans, where currents concentrate debris in gyres—rotating current systems that accumulate floating materials. However, microplastics do not remain exclusively in surface waters; they have been recovered from the deepest ocean trenches, carried downward by sinking organic matter and ocean circulation patterns. Atmospheric transport distributes microplastics globally, with plastic particles detected in rainfall and snow samples from remote locations far from any plastic sources. Soil contamination occurs through agricultural application of sewage sludge, irrigation with contaminated water, and direct deposition from atmospheric sources.

D The biological effects of microplastics have generated substantial research attention and considerable uncertainty. Laboratory studies have demonstrated that various organisms, from zooplankton to fish to mammals, ingest microplastics when exposed to environmentally relevant concentrations. Physical effects may include gut blockage, reduced feeding, and false satiation when plastic particles occupy digestive system capacity without providing nutrition. Chemical concerns centre on two mechanisms: the leaching of additives incorporated during plastic manufacturing, including plasticisers, flame retardants, and stabilisers with documented toxic properties; and the adsorption of environmental pollutants onto plastic surfaces, potentially concentrating contaminants and facilitating their transfer into organisms. However, translating laboratory findings to real-world ecological impacts remains challenging, as experimental conditions often differ substantially from natural environments.

E Human exposure to microplastics occurs through multiple pathways that researchers are only beginning to characterise fully. Seafood consumption represents an obvious route, as shellfish and fish accumulate microplastics from their environments. Drinking water, both bottled and tap, contains microplastic particles, though concentrations vary considerably between sources and locations. Airborne microplastics contribute to inhalation exposure, particularly in urban environments where traffic and industrial activities generate plastic-containing particles. Food packaging may transfer microplastics to contents, while food processing equipment and preparation surfaces contribute additional contamination. Recent studies detecting microplastics in human blood, lungs, and placental tissue confirm that these particles enter and circulate within human bodies, though health implications remain under investigation.

F Addressing microplastic pollution requires interventions across the entire plastic lifecycle, from production to disposal. Source reduction strategies include banning primary microplastics in consumer products—regulations already implemented in several countries for personal care microbeads—and reducing overall plastic production and consumption. Improved waste management can prevent plastic from entering environments where degradation into microplastics occurs, though this approach faces implementation challenges in regions lacking adequate infrastructure. Wastewater treatment plants capture substantial proportions of microplastics, though significant quantities still pass through to receiving waters, and captured particles concentrated in sewage sludge may subsequently contaminate soils when applied as agricultural fertiliser. Innovative technologies for removing microplastics from water bodies remain largely experimental, with questions about scalability, cost-effectiveness, and potential ecological impacts of removal methods.

G The microplastic challenge exemplifies broader difficulties in managing novel environmental pollutants. Unlike many conventional contaminants with identifiable point sources and established toxicological profiles, microplastics encompass diverse materials with varied properties, originate from countless diffuse sources, and interact with ecosystems through mechanisms still being elucidated. Scientific uncertainty complicates policy responses, as regulatory frameworks typically require demonstrated harm before imposing restrictions. Precautionary approaches that limit microplastic release despite incomplete knowledge face resistance from industries arguing that current evidence does not justify costly interventions. Resolving these tensions while preventing irreversible environmental damage represents a defining governance challenge as societies confront the long-term consequences of plastic dependency.

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Questions 14–20

The passage has seven paragraphs, A–G.

Choose the correct heading for paragraphs A–G from the list of headings below.

Write the correct number, i–xi, in boxes 14–20 on your answer sheet.

List of Headings

14 Paragraph A {{ANSWER:14}}

15 Paragraph B {{ANSWER:15}}

16 Paragraph C {{ANSWER:16}}

17 Paragraph D {{ANSWER:17}}

18 Paragraph E {{ANSWER:18}}

19 Paragraph F {{ANSWER:19}}

20 Paragraph G {{ANSWER:20}}

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Questions 21–24

Complete the sentences below.

Choose NO MORE THAN TWO WORDS from the passage for each answer.

Write your answers in boxes 21–24 on your answer sheet.

21 Synthetic clothing releases tiny fibres when it is put through {{ANSWER:21}}.

22 Ocean currents concentrate floating plastic debris in rotating systems called {{ANSWER:22}}.

23 Chemicals may be transferred into organisms when pollutants are adsorbed onto {{ANSWER:23}}.

24 Microplastics have recently been found in human blood, lungs, and {{ANSWER:24}}.

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Questions 25–26

Choose the correct letter, A, B, C or D.

Write the correct letter in boxes 25–26 on your answer sheet.

25 According to the passage, wastewater treatment plants {{ANSWER:25}}

A      remove all microplastics from water completely.

B      capture most microplastics but some still escape.

C      have no effect on microplastic levels.

D      are the main source of microplastic pollution.

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26 The writer suggests that regulating microplastics is difficult because {{ANSWER:26}}

A      governments are not interested in environmental protection.

B      microplastics have been proven completely harmless.

C      there is still scientific uncertainty about their effects.

D      plastic manufacturers control all regulatory agencies.

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SECTION 3: Questions 27–40

Read the passage below and answer Questions 27–40.

The Psychology of Procrastination

Procrastination—the voluntary delay of intended actions despite expecting negative consequences—represents one of the most pervasive yet poorly understood aspects of human behaviour. Surveys consistently indicate that approximately twenty percent of adults identify as chronic procrastinators, while significantly higher proportions report occasional procrastination that interferes with their goals and wellbeing. Far from mere laziness or poor time management, procrastination involves complex psychological mechanisms that researchers have only recently begun to untangle. Understanding why humans systematically act against their own interests illuminates fundamental questions about motivation, self-regulation, and the nature of rational behaviour.

The emotional dimensions of procrastination have received increasing attention from researchers seeking to explain its persistence despite obvious costs. Contemporary theories emphasise that procrastination functions primarily as an emotion regulation strategy rather than a time management failure. Individuals facing tasks that evoke negative emotions—anxiety about performance, fear of failure, boredom with tedious work, or resentment of imposed obligations—may procrastinate to escape these unpleasant feelings in the short term. This mood repair comes at the cost of future wellbeing, as delayed tasks often become more stressful and consequences accumulate. The procrastinator knows intellectually that delay will worsen outcomes but prioritises immediate emotional relief over long-term interests, a pattern sometimes described as giving in to "feel good" at the expense of "being good."

Temporal discounting—the psychological tendency to value immediate rewards more heavily than future rewards—provides another lens for understanding procrastination. Humans generally prefer smaller immediate benefits over larger delayed benefits, a preference that economists and psychologists term hyperbolic discounting. This tendency served adaptive functions in ancestral environments where future outcomes were uncertain and immediate survival paramount. However, modern contexts frequently require sustained effort toward distant goals, creating systematic conflicts between present desires and future welfare. The student who chooses entertainment over studying, despite recognising the importance of academic performance, exemplifies this temporal tug-of-war. Interestingly, research suggests that procrastinators do not differ from non-procrastinators in their valuation of future outcomes when considering them abstractly; differences emerge in actual choice behaviour when immediate temptations are present.

Individual differences in procrastination tendencies relate to various personality characteristics and cognitive factors. Conscientiousness, one of the five major personality dimensions, shows strong negative correlations with procrastination—conscientious individuals typically exhibit self-discipline, organisation, and achievement orientation that protect against delay. Impulsivity, conversely, predicts greater procrastination, as impulsive individuals struggle to maintain focus on delayed goals when immediate distractions beckon. Perfectionism presents a more complex relationship; while perfectionistic concerns about meeting high standards might motivate diligent effort, maladaptive perfectionism characterised by fear of failure and excessive self-criticism often triggers procrastination as individuals avoid tasks where they might fall short. Self-efficacy beliefs—confidence in one's ability to successfully complete tasks—also influence procrastination, with low self-efficacy promoting avoidance of challenging activities.

The consequences of chronic procrastination extend beyond mere inconvenience to affect multiple life domains substantially. Academic procrastination predicts lower grades, higher dropout rates, and reduced learning outcomes independent of ability differences. Workplace procrastination diminishes productivity, damages professional relationships, and limits career advancement. Health-related procrastination—delaying medical appointments, medication adherence, or lifestyle changes—produces measurable impacts on physical wellbeing. Financial procrastination regarding retirement planning, tax filing, or debt management generates economic costs that compound over time. Perhaps most significantly, chronic procrastination associates with elevated stress, anxiety, depression, and reduced life satisfaction, suggesting that the habit undermines psychological wellbeing even beyond its practical consequences.

Intervention approaches for procrastination have evolved as theoretical understanding has deepened. Early interventions focused primarily on time management skills, assuming procrastinators simply lacked knowledge about scheduling and prioritisation. While such skills retain value, contemporary approaches increasingly address the emotional and motivational roots of procrastination. Cognitive-behavioural interventions help individuals identify and challenge the thoughts that trigger procrastination, such as catastrophic predictions about task difficulty or beliefs that one must feel motivated before beginning work. Acceptance and commitment therapy approaches encourage acknowledging negative emotions associated with tasks while committing to value-aligned action regardless of momentary feelings. Implementation intentions—specific plans detailing when, where, and how tasks will be performed—help bridge the gap between intentions and actions by reducing the decision-making burden when execution opportunities arise.

Environmental modifications offer complementary strategies for reducing procrastination. Removing or reducing access to distractions—disabling smartphone notifications, blocking tempting websites, or working in environments without entertainment options—limits the immediate alternatives that compete with intended tasks. Breaking large projects into smaller, more manageable components makes progress feel achievable and provides more frequent completion experiences that sustain motivation. Accountability structures, whether formal deadlines imposed by others or informal commitments to peers, leverage social motivation to counteract procrastination tendencies. The growing recognition that procrastination reflects situational factors as well as individual characteristics has prompted interest in how institutions might design environments that support timely action rather than assuming individuals bear sole responsibility for self-regulation.

The study of procrastination ultimately raises profound questions about human agency and rationality. If individuals consistently act against their acknowledged interests, what does this imply about self-knowledge and self-control? The procrastinator typically recognises the irrationality of delay yet persists regardless, suggesting that rational insight alone insufficiently governs behaviour. Understanding procrastination thus requires grappling with the multiple, sometimes conflicting systems that influence human action—the immediate emotional responses that shape moment-to-moment choices, the deliberative processes that generate long-term plans and intentions, and the social and environmental contexts that facilitate or impede goal pursuit. This complexity explains why procrastination remains common despite near-universal recognition of its costs and widespread desire to overcome it.

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Questions 27–32

Do the following statements agree with the claims of the writer in the passage?

In boxes 27–32 on your answer sheet, write

27 Procrastination is simply a result of laziness and poor time management. {{ANSWER:27}}

28 People procrastinate partly to avoid negative emotions in the short term. {{ANSWER:28}}

29 Humans evolved to prefer immediate rewards over future ones. {{ANSWER:29}}

30 Procrastinators value future outcomes less than non-procrastinators when thinking abstractly. {{ANSWER:30}}

31 Perfectionism always leads to greater productivity and less procrastination. {{ANSWER:31}}

32 Chronic procrastination is associated with higher levels of stress and anxiety. {{ANSWER:32}}

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Questions 33–37

Complete the summary below.

Choose NO MORE THAN THREE WORDS from the passage for each answer.

Write your answers in boxes 33–37 on your answer sheet.

Understanding and Addressing Procrastination

Research shows that procrastination is related to certain personality traits. People with high conscientiousness tend to procrastinate less, while those with high {{ANSWER:33}} find it harder to stay focused on long-term goals. Another factor is {{ANSWER:34}}, which refers to how confident people feel about completing tasks successfully. Modern treatments for procrastination go beyond teaching time management. Cognitive-behavioural approaches help people question thoughts that cause procrastination, such as the belief that they need to feel {{ANSWER:35}} before starting work. Making specific plans about when and where to complete tasks, known as {{ANSWER:36}}, can also be effective. Additionally, modifying one's surroundings by removing {{ANSWER:37}} can help reduce the temptation to delay important tasks.

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Questions 38–40

Choose the correct letter, A, B, C or D.

Write the correct letter in boxes 38–40 on your answer sheet.

38 What does the writer suggest about the relationship between perfectionism and procrastination? {{ANSWER:38}}

A      Perfectionism always prevents procrastination.

B      Perfectionism has no relationship with procrastination.

C      Some forms of perfectionism can actually increase procrastination.

D      Only non-perfectionists struggle with procrastination.

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39 According to the passage, why have institutions become interested in environmental factors affecting procrastination? {{ANSWER:39}}

A      Because individuals cannot control their own behaviour at all.

B      Because procrastination is influenced by situations, not just personal traits.

C      Because time management training has been completely abandoned.

D      Because employers want to blame workers for low productivity.

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40 What is the writer's main argument in the final paragraph? {{ANSWER:40}}

A      Procrastination proves that humans are completely irrational.

B      Understanding why people procrastinate is impossible.

C      Procrastination reveals the complex and sometimes conflicting factors that influence human behaviour.

D      Rational thinking is always sufficient to overcome procrastination.

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— END OF TEST —