It is pretty well understood _____ controls the flow of carbon dioxide in and out the atmosphere today. A. that B. when C. what D. how 答案:C
我当小医生(修改病句)。
1.这篇作文大概肯定是他哥哥帮他写的。
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2.我们兴致勃勃、懒洋洋地来到世界公园。
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3.三(2)中队开展了学习雷锋。
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4.读了《少年》这首诗,使我深受鼓舞。
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