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 来源：考试大 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 来源：考试大 6. ______ under a microscope, a fresh snowflake has a delicate six-pointed shape. A. Seeing B. SeenC. To see D. To be seen 来源：考试大 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 来源：考试大 9. You ought ______ the matter to the manager the day before yesterday. A. to reportB. to have reportedC. to reporting D. have reported 来源：考试大 10. We look forward to ______ to the opening ceremony. A. invite B. be invitedC. having been invited D. being invited