20.　 -Don’t you want to go to a karaoke bar with us?

-I wish I _________, but I have an appointment.

A. may　　　 B. could　　　　 C. can　　　 D. should

19.　 _____________ in the rules that you should not tell other people the password of your e-mail account.

A. What is required　 B. What requires　　 C. It is required　 D. It requires

18.　 The teacher agreed to the suggestion that the students ___ two weeks to prepare for the exam.

A. give　　 B. should give　　 C. be given　 D. would be given

17.　 If the weather had been better, we could have had a picnic. But it _______ all day.

A. rained　 B. rains　　 C. has rained　　 D. is raining

16.　 __________ it be rainy tomorrow, we would pay a visit to the art exhibition.

A. Will　　 B. Would　　 C. Should　　 D. Was

15.　 ___________ the warning message, more lives __________ in the flood.

A. In spite of; would lose　　　　　 B. Without; would have lost

C. But for; would have been lost　　 D. Instead of; would be lost

14.　 -I’m sorry to keep you waiting．I’ll make shorter work of this．

-_________. I’m not in a hurry．

A. Take it easy　　 B. Take your time　 C. Not at all　 D. Do as you please

13.　 Now that my sister Kelly is out of job, she ___________ going back to school, but she hasn’t decided yet.

A. had considered B. has been considering C. considered D. is going to consider

12.　 I decided to _________ Jenny, but please don't broadcast it around since I haven't talked to her yet.

A. break away from　　 B. break up with　 　 C. break into 　D. break out

11.　 -What do you think of the books?

-Oh, excellent. It’s ___________ a second time.

A. very worth to be read　　 B. quite worthy of being reading

C. well worth reading　　　 D. rather worthwhile to read