What my mother can do is_____me look after my baby
问题描述：
What my mother can do is_____me look after my baby
What my mother can do is____me look after my baby when I go out to work.
A,to be helped
B,being helped
C,helps
D,help
麻烦说下为什么，很奇怪
答
选D.本来应该是to help,但是主语部分出现实意动词do,表语部分的to可以省略.
句意：我妈能做的事情是我上班的时候帮我照看孩子.