---Must we turn off the TV now?

问题描述:

---Must we turn off the TV now?
---No,you___now,but you___when Baby is sleeping
A.needn't```need B.mustn't```must C.mustn't```need D.needn't```must

D
must的疑问句用need或needn't回答
but you___when Baby is sleeping 意思是但是你必须在孩子睡着的时候关掉电视,所以第二个空用must