10. —Jim is very sick these days. He coughs so badly.

―In my opinion • he really   listen to the doctor and cut down on smoking.

A. should      B. can

C may          D. need

10. Lily played the trick on Jim on purpose, so she ___________ have been forgiven.

9. ―Sorry, Mum. I got a G in the exam.

—You      have done better, but you didn't try your best.

A. would        B. must

C. could       D. shall

9.    —―They________ have prepared for the meeting more carefully.

— But they didn't. What a pity!

8. —What sort of house do you want to have? Something big?
~ Well. it ______ be big―that's not important.

7. My sister met him at the Grand Theatre yesterday afternoon, so he have attended your lecture.

6. ―I'd love to go to the party with you tonight.

—Oh,I'm sorry, but there ________ be a party because of the coming exam.

5.    What do you mean, there are only ten tickets? There _______ be twelve.

8. It was so nice of you to come to our aid. I don't think we    it without you. 

A.    can manage

B.    could have managed

C.    must have managed

D.    could manage

4.    ―When was it that your brother got home last night?

―It ______ have been around nine o'clock when he drove back home, for it was very dark.