There was too much noise just now. So I ________ hear the speaker very well.
A.needn't B.couldn't C.shouldn't D.mustn't
The plane is fast, but it's expensive. I ________ take a train to get there.
A.may B.need C.must D.should
________ you attend the meeting? I'm really looking forward to seeing you.
A.Will B.May C.Could D.Can
It's my turn to be on duty today. You ________ clean the classroom.
A.may not B.needn't C.mustn't D.can't
David, ________ you show me the way to use this machine?
A.could B.may C.should D.must
The society is developing fast. We________ keep learning to catch up with the development.
A.might B.had better C.could D.may
