题目内容
【题目】
They have discussed for several years of drafting a new law to control the pollution, but when it will be is still unknown
put to use
B. put into effect
C. put into operation
D. put forward
【答案】B
【解析】句意:他们已经讨论起草新法规以控制污染好几年了,但什么时候实施还不知道。put into effect实施;put into operation运行;put forward提出,提前。
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