I seem __________ her somewhere before but I can't make sure.A. to see B. to be seeingC: to have seen D. to be seen
15. In an emergency, you should remain _____.
14. It was a _____ evening and I really had a good sleep.
13. The foreman(工头) beat him _____ , and the other workers were very angry with him.
12. Although he was not _____ tired, he didn’t care _____.
11. How time flies! You should make _____ use of your time.