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thuyylinhh
2 năm trước
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Nguyen Thi Anh Vien performed so well in the 28th Sea Games women’s 200m butterfly that one of her rivals could ____ her.
A.catch up with
B.come up to
C.look up to
D.put up to
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Read the following passage and the mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 32 to 41.
Plants and animals will find it difficult to escape from or adjust to the effects 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 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 popular and mountaintop regions, are specially at risk because migration to new habitats is not possible. For example, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere father north 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, may 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 the waters. This acidification further stresses ocean ecosystems.
From “Global Warming” by Michael Mastrandrea and Stephen H.Schneider
Scientists have observed that warmer temperatures in the spring cause flowers to __________
A.bloom earlier
B.die instantly
C.become lighter
D.lose color

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