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【题目】Nowadays science and technology _______ so rapidly.

A. is changing B. has changed

C. will have changed D. will change

【答案】A

【解析】

思路分析:本题考查的是现在进行时的句子结构。

名师解析:通过分析,本句意思是:当今科学技术变化太快Nowadays表示当今,是现在进行时的标志,主语science and technology意思是科学技术,是个单数名词,故答案为:A。

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