1.-----I go out to play now,Mum?

1._____I go out to play now,Mum?
No you ——.You shuold do your homewerk first.
A.Must;must`t B.Must;wouldn`t C.May;needn`t D.May;had better not
2.____you like to have a walk with us this evening?
A.Did B.Would C.Shuold D.Can
3.You____be caerful when you cross here ---the traffic lighs aren`t working.
A.could B.might C.ought to D.may
4.We were all waiting for you ;you___for the seaside by yourself without leaving a message.
A.mustn`t ;leave B.needn`t leave C.shouldn`t have left D.couldn`t have left
5.It ___be she that told him about it;it___be you ,because only you and I konw it.
A.mustn`t ;must B.couldn`t;must C.shouldn`t have mignt D.couldn`t;might