[题目]In the 1950s in the USA, most families had just one phone at home, and wireless phones yet.A. haven’t invented B. haven’t been inventedC. hadn’t invented D. hadn’t been invented 题目和参考答案——青夏教育精英家教网—

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【题目】In the 1950s in the USA, most families had just one phone at home, and wireless phones _______ yet.

A. haven’t invented B. haven’t been invented

C. hadn’t invented D. hadn’t been invented

【答案】D

【解析】考查时态。句意：在美国20世纪50年代的时候，大多数的家庭家里只有一部电话，并且无线电话还根本没有发明出来。根据句意可知用被动语态，排除A和C，事情发生在过去，与现在无关，排除B，故选D。

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