1. It was not ____ midnight that they discovered the children were not in their beds. A. beforeB. at C. after D. until
2. We shall ask for samples ____ and then we can make our decision. A. to be sent B. being sentC. to sent D. to have been sent
3. I can’t find the recorder in the room. It ___ by somebody. A. must have taken B. may have taken C. may have been taken D. should have been taken
4. We’ll be only too glad to attend your party ______ we can get a baby-sitter. A. so far as B. provided that C. unlessD. except that
5. The old gentleman never fails to help ______ is in need of his help. A. whomB. who C. whoever D. whomever
6. ______ under a microscope, a fresh snowflake has a delicate six-pointed shape. A. Seeing B. SeenC. To see D. To be seen
7. “When are you going to visit your uncle in Chicago?” “As soon as ______ our work for tomorrow.” A. we’re complete B. we’d completeC. we’ll complete D. we complete
8. Neither John nor I ______ able to persuade Richard’s grandfather to attend the wedding. A. am B. areC. are to be D. is
9. You ought ______ the matter to the manager the day before yesterday. A. to reportB. to have reportedC. to reporting D. have reported
10. We look forward to ______ to the opening ceremony. A. invite B. be invitedC. having been invited D. being invited
11. Excuse me, but it is time to have your temperature ______. A. takingB. taken C. took D. take
12. I cannot ______ the truth of your words, although they go against my interests. A. but admit B. but admitting C. help but to admit D. help but admitting
13. When I went to visit Mrs. Smith last week, I was told she____two days before. A. has left B. was leaving C. would leave D. had left
14. The boat will not arrive_____ forty- four hours. A. in B. atC. for D. by
15. In winter, animals have a hard time____ anything to eat. A. to find B. to finding C. to find out D. finding
16. ____ is know to all, too much smoking will cause lung cancer. A. ThatB. ItC. AsD. What
17. I will never forget the ten years _____we both spent in the little village. A. when B. during whichC. which D. in which
18. They are __________ students that they all performed well in the nationwide examinations.