The doctor did what he could the dying man. A. save B. to save C. saving

问题补充：

The doctor did what he could the dying man.

A. save B. to save C. saving

答案：

解析：句意：这位医生尽他的全力去救这个奄奄一息的人。分析：what he could做动词do的宾语，而后面是在讲做的目的，因此用动词不定式的形式。故选B