—Don’t _____ so often. It’s bad for your health.
—I have to. But I know I should have enough sleep.
A．get upB．stay upC．look upD．come up
B

試題分析：句意：不要經(jīng)常熬夜，這樣對你的健康不利。所給選項(xiàng)中g(shù)et up是起床的意思，stay up是熬夜的意思，look up是向上看或查找的意思，come up是出現(xiàn)的意思，根據(jù)題意只能選B。
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