We our foreign teacher since he to America．( )A．haven't heard from,returnedB．didn't hear from,returnedC．didn't hear from,returnsD．haven't heard from,returns 题目和参考答案——青夏教育精英家教网—

3．We ____ our foreign teacher since he ____ to America．（　　）

	A．	haven't heard from；returned		B．	didn't hear from；returned
	C．	didn't hear from；returns		D．	haven't heard from；returns

分析自从我们的外教回国后我们没有收到他的消息．

解答答案：A．考查否定句．句意：自从我们的外教回国我们没有收到他的消息．根据题干中 since 自从，可知句子为现在完成时，构成：have或has+done．否定形式为haven't或hasn't+done．hear from sb得到某人的消息．hear的过去分词是heard．since引导的时间状语从句．从句用一般过去时．所以第二个空用returned．故选A．

点评理解句子意思，分析句子结构和时态，再结合具体语境进行选择．

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