It's no use            with your younger sister because she is a child.    [ ]

A. talking      

B. quarrelling

C. playing      

D. helping

_____ his father came back from work_____ his homework.

A．Not until; he did 　　　　　　　　

B．It wasn't until; when he did

C．It was until; that he didn't do 　

D．It wasn't until; that he did