By the end of last week.I smoking．( )A．had stoppedB．have stoppedC．stoppedD．stops 题目和参考答案——青夏教育精英家教网—

题目内容

3．By the end of last week，I ____________smoking．（　　）

A．

had stopped

B．

have stopped

C．

stopped

D．

stops

分析上周末，我戒烟了．

解答答案：A．结合By the end of last week可知戒烟动作发生在过去的过去，故用过去完成时had+过去分词，故答案是A．

点评过去完成时（The Past Perfect Tense）：表示过去某一时间或动作以前已经发生或完成了的动作对过去的某一点造成的某种影响或是结果，用来指在另一个过去行动之前就已经完成了的事件．它表示动作发生的时间是"过去的过去"，侧重事情的结果．

练习册系列答案

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	A．	was arriving，were having		B．	arrived，had
	C．	was arriving，had		D．	arrived，were having

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-Yes，I _____ them twenty minutes ago．（　　）

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12．I can't decide it now．Please give me __________ time to think about it．（　　）

1．

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