Have him( )it,please(选择)

问题描述:

Have him( )it,please(选择)
如题
A do,B does,C done,D did
WHY?
P.S.help doing sth.是什么用法?

A
have sb do sth 让某人做某事
help doing sth 一搬不单独存在,常见在can't help doing sth 里,意思是“情不自禁做某事”