问题详情:
New medicines and instruments every day to extend life.
A.develop B.are being developed
C.are developing D.have developed
【回答】
B
【解析】
句意:为了延长生命,每天都在研制新的*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。
知识点:被动语态
题型:选择题