1. (surround) by small hills, the lake is very beautiful.
2. He used (drop) in here, but recently we have not seen much of him.
3. He found the letter (hide) under some newspapers.
4. it’s time that something (do) about the traffic problem downtown.
5. (face) with difficulties, we must try to overcome them.
6. I could not but (realize) that something was wrong.
7. It was the first time that he (come) to a concert.
8. There is nobody to prevent me from (marry) him.
9. He must (receive) my letter which was mailed a week ago.
10. After the flood, the mice came out of the hole, each (bite) the other’s tail.
11. (short) of air, water or sunlight is bound to threaten the survival of all the creatures on the earth.
12. The World Bank President is reported (quit) by mistake some software essential to its running.
13. (offer) a scholarship made it possible for her to go to Michigan University for M.A. studies.
14. All the members (arrive) , the chair started the meeting at once.
15. Less than 1% of the global company’s staff (be) Africans.
16. English (speak) in Japanese sound strange to English native speaks.
17. if only he (marry) her daughter to the honest doctor rather than the corrupted official(贪官).
18. Some wild animals are said (die) out already before we realized and tried to save them.
19. I (manage) to do it until you explained how.
20. it seems oil (leak) from this pipe for some time. We’ll have to take the
machine apart to put it right.。