It's hard to keep the children ( ) when they can't go outside and play.

问题描述:

It's hard to keep the children ( ) when they can't go outside and play.
A.amused B.being amused C.amusing D.from being amused

A keep +n.+adj.即keep +宾语+宾补 修饰人用ed分词,修饰物用ing分词.所以是A