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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29.
Polar bears are in danger of dying out. Unlike some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has reduced in size (25) about 30 per cent. The temperature in the Arctic has slowly been rising and this is (26) _ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (27) _ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt.
Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (28)_ _ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (29) fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further.
Câu hỏi:(25)....................
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A.
in
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B.
by
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C.
within
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D.
for
Lời giải tham khảo:
Đáp án đúng: B
Dịch: Kể từ năm 1979, chỏm băng ở Vòng Bắc Cực nơi gấu Bắc Cực sinh sống đã giảm kích thước khoảng 30%.
Hãy trả lời câu hỏi trước khi xem đáp án và lời giải -
A.
Câu hỏi này thuộc đề thi trắc nghiệm dưới đây, bấm vào Bắt đầu thi để làm toàn bài
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- Since 1979, the ice cap at the Arctic Circle where the polar bears live has reduced in size
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- They catch them by waiting next to the air holes seals have made in the ice.
- They can cover a huge territory and often swim from one part of the ice to another. They have been
- they may have to swim further and this can
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