[题目]New medicines and instruments every day to extend life.A. develop B. are being developedC. are developing D. have developed 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】New medicines and instruments every day to extend life.

A. develop B. are being developed

C. are developing D. have developed

【答案】B

【解析】

句意：为了延长生命，每天都在研制新的药物和仪器。考查动词语态辨析题。new medicines and instruments是动词develop的受动者，需用被动语态，ACD三项都是主动语态，可排除。根据句意结构，可知选B。

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