考试
2020-03-16 06:44:28

8951 Today the American doctor

题目描述

Today the American doctor is one of the foremost heart-transplant surgeons in the world, _



Today the American doctor is one of the foremost heart-transplant surgeons in the world, ______tens of such operations each year.

A.to perform

B.performing

C.to performing

D.perform

请帮忙给出正确答案和分析,谢谢!

答案解析

B本题考查非谓语动词的用法,据题意,现在

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