難度:★ 考點(diǎn):情態(tài)動(dòng)詞的用法
1.You________stop when the traffic light turns red.
A.can B.had better C.need D.must
2.When winter comes,days get______.
A.long and long B.short and short C.longer and longer D.shorter and shorter
3.-Mum,must I stay there the whole day?
-No,you____________.You____________come back after lunch,if you like.
A.mustn't;can B.needn't;must C.needn't;may