If Newton lived today,he would be surprised by what in science and technology. A. had discovered B. had been discovered C. has discovered D. has been discovered 题目和参考答案——青夏教育精英家教网—

题目内容

4. If Newton lived today,he would be surprised by what in science and technology.

A. had discovered B. had been discovered

C. has discovered D. has been discovered

4. D

4. D解析：考査动词时态和语态辨析。句意:假如牛顿生活在今天，他会对当今科技中的新发现感到惊异。从句中的谓语动词应使用现在完成时的被动语态，故选D项。

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There is an English saying “ 1 ” Until recently, few people took the saying seriously. Now,however,doctors have begun to look into laughter and the effects it has on the human body. 2

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