7. Mr. Jones is on time for everything. How ______ it be that he was late for the opening ceremony?
A. may B. should C. can D. must
8. — What a beautiful skirt you are dressed in today! Where did you buy it?
— ______ ; I bought it in Beijing.
A. Not beautiful at all B. Don’t mention it
C. It is very kind of you to say so D. You’re welcome
9. You must do your homework now; you ______ computer games all the evening.
A. have been playing B. play
C. are playing D. played
