A complete timed IELTS test

You leave fingerprints on the keyboard, the door handle and your coffee cup. They are silent autographs that we deposit, without thinking, on almost everything we touch — and we have used them to identify each other for at least four thousand years.

Section A   Fingerprints are formed during the third or fourth month of life in the womb, when ridges of skin develop on the tips of the fingers in patterns that no one fully understands. Genes set the broad pattern type — arches, loops or whorls — but the fine details are shaped by random pressures inside the womb, so that no two fingerprints, not even those of identical twins, are exactly alike. Once formed, the ridges remain essentially unchanged through life. A burn or deep cut may scar a fingertip, but the underlying pattern returns as the skin heals.

Section B   Long before modern policing, ancient civilisations recognised that a fingerprint could authenticate a document. Babylonian clay tablets from around 2000 BCE carry the thumbprint of the maker, pressed into the soft clay as a kind of signature. In imperial China, official documents and legal papers were often signed with an inked thumbprint, and during the Tang dynasty Chinese courts recorded the earliest known use of fingerprints in legal disputes — to identify a suspect from the print left at the scene. Even when most people could not write, a fingerprint provided a personal mark that was very hard to fake.

Section C   Modern fingerprint science was a nineteenth-century achievement. The British scientist Francis Galton showed in the 1880s that fingerprints could be sorted into a small number of consistent pattern types and so be searched and compared efficiently. Building on Galton’s work, the British official Edward Henry developed a practical filing system that allowed millions of prints to be stored and retrieved. With Galton’s classification and Henry’s filing method, fingerprints became, for the first time, a usable identification system rather than a curiosity.

Section D   Police forces adopted fingerprints quickly because the new system answered three practical questions at once: it was uniquely tied to an individual, it could be collected cheaply and repeatedly, and a print left at a crime scene could be compared against a growing reference collection. Scotland Yard formed its first fingerprint bureau in 1901, and within a generation fingerprints had displaced older identification methods such as detailed body-measurement records, which were both more expensive and less reliable.

Section E   Today fingerprints have moved well beyond the police station. The same patterns are now used by phones and laptops as a quick form of biometric identification, allowing devices to unlock with the touch of a finger. The technology is no longer treated as infallible, however. In 2004, after the Madrid train bombings, the FBI initially announced a fingerprint match to an Oregon lawyer named Brandon Mayfield, only to discover, weeks later, that the match was incorrect. The Mayfield case forced experts to reconsider claims that fingerprint identification is essentially error-free, and it remains the most-cited example of fingerprint evidence proving unreliable.

Modern courts therefore treat fingerprint evidence as strong but not absolute, and routinely combine it with other techniques. Yet the technology that began with a thumbprint pressed into Babylonian clay is still doing much the same job it did then: connecting a particular human being, beyond easy doubt, to a particular place or document.

Section A   A museum is rarely a neutral container for objects. The way a museum is designed — its building, its lighting, the layout of its galleries — quietly tells visitors what kind of experience they are meant to have. Across the past two hundred years, three broad approaches to museum design have dominated, each reflecting the assumptions of its time about what a museum is for, and who it is for. This passage introduces these three approaches in brief overview before considering how today’s museums combine them.

Section B   The earliest of the three is the “palace” style, which was popular mainly in the eighteenth and nineteenth centuries. Grand European museums of this period — the British Museum, the Louvre, the Hermitage — present themselves as buildings designed to display power. Their architecture mimics palaces and classical temples: a monumental facade with columns, grand staircases leading up to the galleries, ornate ceilings, gilded frames. The exhibits, often plundered or purchased, were presented as treasures: the visitor was a guest in a temple of knowledge, expected to behave with quiet reverence. These buildings were intended, quite openly, to display the nation’s wealth and prestige.

Section C   By the early twentieth century, this approach felt heavy and dated. A reaction set in among artists, curators and architects, who argued for a much plainer setting. In the new approach — the “modernist” or “white-cube” style — walls were painted plain white to reduce distraction, lighting was diffused and even, and the architecture stayed deliberately quiet. The Museum of Modern Art in New York, which opened in 1929 and moved to a purpose-built modernist home in 1939, became the model copied around the world. The argument was straightforward: in a neutral space, the artwork itself does the talking. The white cube emphasises minimalism precisely so that the artwork speaks for itself, without competing with the architecture around it.

Section D   From the late twentieth century onwards a third approach has gained ground: an immersive, participatory style that turns the visitor from a respectful guest into an active participant. In this approach, lighting is theatrical rather than neutral, exhibits are accompanied by soundtracks, projections and tactile screens, and visitors interact with exhibits using multimedia and physical activity rather than simply looking. Science museums and modern history museums in particular have embraced this style, partly because younger audiences expect it. The approach is not without critics. Traditionalists argue that elaborate staging can distract from the objects themselves, and that the experience risks being remembered above the content.

Most museums today, in fact, mix elements of all three approaches: a classical staircase that opens into a white-walled gallery and ends, perhaps, in an immersive multimedia room. The history of museum design is therefore less a tidy succession than a layering of approaches, each preserving what worked in the last. Reading a museum’s design — its lighting, its walls, the way visitors move through it — remains one of the quickest ways to understand what its makers think a museum is, in a given moment, supposed to be.

Section A   Few human achievements are as routine, and as remarkable, as a small child learning to speak. In four or five years, a healthy child moves from babbling to producing original sentences nobody has spoken before. How they do it has been one of the central questions of modern psychology, and three broad theories continue to dominate the discussion. They are not pure rivals; researchers usually take from each. But each theory makes a distinctive claim about where language comes from.

Section B   The first is the behaviourist theory, associated above all with the American psychologist B. F. Skinner. On this view, language is learned in essentially the same way as other behaviour: through imitation and reward. A child hears the word “milk” from its caregiver, repeats it, is rewarded with attention or the desired object, and the link is strengthened. Repeated practice strengthens behaviour, on this account, so that the child gradually builds up a vocabulary and the basics of grammar. The theory has practical appeal — it is simple, observable and broadly compatible with how parents actually behave — and it underpins many language-teaching methods that emphasise repetition and positive feedback.

Section C   The behaviourist account, however, ran into a serious challenge. The American linguist Noam Chomsky argued in the late 1950s that imitation could not explain the speed and creativity of children’s language. By the age of three, ordinary children produce sentences they have never heard before, and they master complex grammatical rules without anyone ever explicitly teaching them. Chomsky’s alternative is what is now known as the nativist theory: children are born with an innate language ability, a mental capacity dedicated to language. He proposed that all human languages share underlying structural features — what he called Universal Grammar — and that human children come into the world ready to extract these features from whatever language is spoken around them. The brain, on this account, has something like a dedicated module for language.

Section D   A third tradition agrees with Chomsky that the child is doing more than imitating but disagrees that the explanation is purely biological. Social interactionist theorists, including Jerome Bruner and Lev Vygotsky, emphasise the role of caregivers and social context. They point out that adults across cultures tune their speech to a child’s level, slowing down, exaggerating intonation and using simpler grammar — what is informally called baby talk. The child’s language develops, on this view, not in a vacuum but through countless small conversations with adults, who guide progress, repair mistakes and lift the child to slightly more advanced forms of speech.

Section E   The three theories do not explain the same things equally well. Behaviourism handles vocabulary growth and the influence of feedback elegantly, but struggles with creative sentence production. Nativist theory accounts for the rapid mastery of complex grammar without explicit instruction, which is the central piece of evidence cited for an innate language faculty, but it has less to say about the obvious effect of social experience. Social interactionism explains why children deprived of normal conversation develop language poorly, but does not by itself explain why language emerges so reliably and uniformly across very different cultures.

Section F   Most researchers today combine elements of all three theories. A child seems to be a born language learner — Chomsky’s contribution — but also a creature of habit and reward, as Skinner described, and an immensely social being whose progress depends on the people around them, as Bruner and Vygotsky insisted. The richness of human language probably requires all three accounts at once.