30. -You shouldn’t have talked back to our teacher like that. It was awfully impolite.　

　　 -You are right. I _______ crazy at that moment.　

　　 　　　 A. must have been　　 　　　　　　　　　　　　　　　　　　 B. might be　　　 　　　　 　

C. could have been 　　　　　　　　　　　　　　　　　　　　 D. should have been

29. Smith was overweight, so the doctor urged that not only _______ have less fat and meat, but also he _______ .

　　　 A. should he; take exercise　　 　　　　　　　 　　 B. ought he; take exercise

　　　 C. he should; takes exercise　 　　　　　　　 　　 D. he ought; takes exercise

28. Steven has a lot of work to _________ in the office since he has been away for quite a few days.

　　　 A. take up　　　 　　　　　 B. make up　　　　　　　　　 C. work out　　　　　　　　　 D. carry out

27. -The experiment is of particular importance.

-I see. We will carry on with it ________ we can get enough money.

　　　 A. unless　　　 　　　　　 B. though　　　　　　　　　　　　　　 C. whether　　　　　　　　　　 D. then

26. Despite the great success of Chang’e-l, experts say, it will be at least ten years _______ our astronauts can land on the moon.

A. while　　　　 　　　　　　　 B. before　　　　 　　　 C. since　　　　　 　　　 D. until

25. Many students in this school make _______ a rule to come to the evening classes even on　　 Saturdays.

A. this　　　　　 　　　 B. that 　　　　　　　　　　　　 C. it　　　　　　　 　 D. them

24. -I can’t imagine Phelps smoking marijuana (大麻).

-___________.　

A. Nor am I　 　　　　　　 B. So do I　　 　　　　　　 C. Me, too　 　　　　　　　　 D. Me, neither

23. _______ we can’t remove our troubles in life for ever, we can leave them behind when we are on vacation.　

A. When　　　 　　　　　 B. While　　　 　　　　　　 C. Unless　　　 　　　　 D. Until　

22. It was reported that 208 couples tied the knot in a group of wedding ceremony held in front　 of the Bird’s Nest in Beijing, _______ 230 had taken part in the Olympic security work.

A. whom　　　　 　　 　　　 B. which 　　　　 　　 C. in which　　　　　　　　　 D. of whom