28. -Why did you go back to the shop?　　 -1 left my friend ___ there.(2003Anhui)

A. waiting　　　　 B. to wait　　　　 C. wait 　　　　　　D. waits

27.A cook will immediately be fired if he is found ___in the kitchen.　 (NMET 2003)

A. smoke　　　　　 B. smoking　　　 　C. to smoke　　　　 D. smokes

26. ________ to sunlight for too much time will do harm to one's skin.(2002Shanghai)

A. Exposed 　　 B. Having exposed C. Being exposed 　 D. After being exposed

25. Don't use words, expressions, or phrases ____ only to people with specific knowledge.

A. being known　　 B. having been known C. to be known　 D. known 　(2002Shanghai)

24. Quite a few people used to believe that disaster __________ if a mirror was broken.

A. was sure of striking　　　　　　 B. was sure of having struck 　(2002Shanghai)

C. was sure to be struck　　　　　　 D. was sure to strike

23. In order to gain a bigger share in the international market, many state-run companies are striving __________ their products more competitive.　　　　　 　(2002Shanghai)

A. to make　　　　 B. making　　　　 C. to have made　　 D. having made

22. Prices of daily goods 　　　　　through a computer can be lower than store prices.

　 　A. are bought　 　　B. bought　　　 　C. been bought　　 　D. buying 　(2002spring)

21. The mother didn’t know _____to blame for the broken glass as it happened while she was out. A. who　 　　　　B. when　　　 　　C. how　　　　　　 　D. what　　　　 (NMET2002)

20.The research is so designed that once _____nothing can be done to change it.(NMET 2002)

A. begins　　　　 　B. being begun　 C. beginning 　　　D. begun

19.It is said in Australia there is more land than the government knows _____. (NMET 2002)

A. it what to do with　 　　　　　　B. what to do it with　

C. what to do with it　 　　　　　　D. to do what with it