Câu hỏi:
29/04/2020 195Read the following passage and mark the letter A, B, C or D to indicate the best option for each of the blanks.
THE FASTEST DINOSAUR
According to computer models that were used to estimate the running speeds of dinosaurs, the Tyrannosaurus Rex would have been able to outrun a footballer. The study shows that the dinosaur could reach a top (24) ________ of 8 metres a second, which is fractionally faster than the average professional footballer. There has been a lot of controversy (25) ________ whether the Tyrannosaurus Rex was a predator or a scavenger; some believe that its highly developed sense of smell indicates that it was a scavenger, while others say that its keen eyesight shows that it was a hunter. The (26) ________ group will appreciate the recent study, as a hunter is more likely to require such speed.
The University of Manchester study used a powerful supercomputer to calculate the running speeds of five meat-eating dinosaurs and used data taken directly from dinosaur fossils, rather than referring to previous work on modern animals. The Tyrannosaurus Rex, however, was not the fastest dinosaur. A small dinosaur (27) ________ Compsognathus, which was about the size of a chicken, could run at 18 metres a second, which is faster than the ostrich, the fastest two-legged animal today. It could run 100 metres in a little over six seconds, which would beat modern Olympic (28) ________ more than a third of the track behind.
Điền câu 24
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Câu 6:
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Câu 7:
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.
From “global warming” by Michael Mastrandrea and Stephen H.Schneider
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