根据语境,用can,may,might,can't,must,mustn't等情态动词填空
1.--___I take exercise now,doctor?
--No.You need to rest.You___exercise in three months time.
2.--Oh,how nice the skirt is!___I try it on?
--Yes,of course.
3.--____I use your dictionary,Kitty?
--Of course you____,Millie.We're good friends.What's mine is yours.