After the operation, the first thing he does every morning is _____ plenty of exercise.
问题描述：
After the operation, the first thing he does every morning is _____ plenty of exercise.
A. to takeB. takingC. takeD. to be taken
选哪个?为什么?
答案是C,我选B,为什么不能是B?
答
选C.没错.你记住哦,如果前面有“do”,后面就选动词原形.如果前面没有“do”则选to do.