31. Where did you get your watch ________?
A. repair B. to repair C. repaired D. repairing
32.He didn‘t come yesterday. He ______busy working in the lab.
A. must be B. would have been C. must have been D. would be
33. ______, he must be totally exhausted after a two weeks‘ trip by bus.
A. Being very strong B. A a strong man C. Strong as he is D. As he is strong
34. How I wish that I ________law when I was at college!
A. had learned B. would have learned C. learned D. would learn
35. No sooner ______than he realized that he should have remained silent.
A. the words had spoken B. had the words spoken C. the words had been spoken D. had the words been spoken