24. In some parts of London, missing a bus means______ for another hour. (2002上海春招)

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

23. Prices of daily goods______ through a computer can be lower than store prices. (2002春招)

　　　　 A. are bought 　 B. bought 　　 C. been bought 　D. buying

22. ______ to sunlight for too much time will do harm to one's skin. (2002上海)

　　　　 A. Exposed 　　　　　　 B. Having exposed 　

　　　 C. Being exposed 　　　　　 D. After being exposed

21. Don't use words, expressions, or phrases_______ only to people with specific knowledge. (2002上海)

　　　 　A. being known 　B. having been known 　C. to be known 　D. known

20. Though______ money, his parents managed to send him to university. (2002上海)

　　　　 A. lacked 　　 B. lacking of 　 C. lacking 　　 D. lacked in

19. Quite a few people used to believe that disaster_____ if a mirror was broken. (2002上海)

　　　 A. was sure of striking 　　　B. was sure of having struck

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

18. In order to gain a bigger share in the international market, many state-run companies are striving______ their products more competitive. (2002上海)

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

17.It is said in Australia there is more land than the government knows ______. (NMET2002)

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

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

16. Having a trip abroad is certainly good for the old couple, but it remains______ whether they will enjoy it. (NMET2002)

　　　　 A. to see 　　B. to be seen 　　　 C. seeing 　　D. seen

15. ______ such heavy pollution already, it may now be too late to clean up the river. (NMET2001)

　　　 　A. Having suffered B. Suffering 　　C. To suffer 　 D. Suffered