The doctor did what he could the dying man.A. saveB. to saveC. savedD. saving

问题补充：

The doctor did what he could the dying man.

A. save

B. to save

C. saved

D. saving

答案：

A. save

(答案→)B. to save

C. saved

D. saving

解析：考查动词不定式。句意：这位医生做他能够做的事件来救这位即将要死的人。故选B。