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【题目】As we all know, wood floats ______ you put it into water.

A.ifB.orC.butD.and

【答案】A

【解析】

句意:我们知道,如果我们把木头放入水中,木头就会浮起来。

A. if是从属连词,意思是如果;是否B. or或者;C. but但是;D. and和;与。根据As we all know, wood floats ______ you put it into water. 我们知道,_______ 我们把木头放入水中,木头就会浮起来。可知,应该选择if如果;符合语境。故选A

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