7._ Peter, don't play that kind of joke anymore!
_ Sorry! I ( ) do it again.
A.musn't B.can't C.wouldn't 这个是不是C
14._ I need your help. Would you mind taking care of my house while I'm away on vacation,John?
_（ ）
A.Certainly,I would B.OK,I'll do it C.I'm sorry,I can do it 这个是不是B
5.（ ）is a real problem in our life today.
A.Rubbish（什么意思?最好说明下） B.Voice C.Noise D.Sound 是不是选D，可是我又觉得是C