.Everyone should __________ his best to do things wellEveryone should __________ his best to do things well. A. do B to do C does D doing

问题描述:

.Everyone should __________ his best to do things well
Everyone should __________ his best to do things well.

A. do B to do C does D doing

A.do
should 是情态动词,它的后面必须跟动词原形!