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【题目】 For many years, people __________ electric cars. However, making them has been more difficult than predicted.

A. had dreamed of B. have dreamed of

C. dreamed of D. dream of

【答案】B

【解析】句意:多年以来,人们都梦想着电力汽车的出现。但是,制造电力汽车比预想的要更加困难。根据时间状语For many years可知句子时态为完成时态,故排除C项和D项;句子并没有过去的时间或过去的动作,因此不存在“过去的过去”,排除A项。故答案为B项。

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