It seems very difficult _______.

问题描述:

It seems very difficult _______.
A.to stop the child to cry
B.restraining the child to cry
C.to keep the child from crying
D.holding the child's crying
为什么选C

it is difficult to do是固定搭配.所以用to keep
keep .from doing固定搭配.阻止.做某事.
这句话的意思,让这个孩子停止哭泣,似乎很难.