The first use of atomic weapons was in 1945.And their power increased enormously ever since. A. is B. was? C. has been D. had been? 题目和参考答案——青夏教育精英家教网—

题目内容

The first use of atomic weapons was in 1945.And their power _______ increased enormously ever since.

A. is B. was?

C. has been D. had been?

解析:

此题考查时态的用法。前面讲1945年首次使用原子弹，而后面一句无确定的过去时间，但ever since确定了应选C项，因为ever since和完成时态连用,指的是“从那以后”，即since 1945。

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