16.In the dark forests ________, some large enough to hold several English towns.

　　A.stand many lakes

　　B.lie many lakes

　　C.many lakes lie

　　D.many lakes stand

　　17. With more forests being destroyed, huge quantities of good earth ______ each year.

　　A. is washing away

　　B. is being washed away

　　C. are washing away

　　D. are being washed away

　　18. The country life he was used to ______ greatly since 1992.

　　A. change

　　B. has changed

　　C. changing

　　D. have changed

　　The president spoke at the business meeting for nearly an hour without _________ his notes.

　　A.bringing up B.referring to

　　C.looking for D.trying on

　　20. _________ I explained on the phone, your request will be considered at the next meeting.

　　A.When B.After

　　C.As D.Since

　　21. It is almost five years we saw each other last time.

　　A. before B. since

　　C. after D. when

　　22. There is no light in the dormitory. They must have gone to the lecture, ________?

　　A. didn't they B. don't they

　　C. mustn't they D. haven't they

　　23. I'm going to the supermarket this afternoon. Do you have anything ________?

　　A. to be buying B. to buy

　　C. for buying D. to be bought

　　24. Along with the letter was his promise ________ he would visit me this coming Christmas.

　　A. which B. that

　　C. what D. whether

　　25.You must keep on working in the evening, ______ you are sure you can finish the task in time

　　A.as B.if

　　C.when D.unless

　　26. recent report stated that the number of Spanish speakers in the U.S. would be higher than the number of English speakers by year 2090.

　　A. A; the B. A;不填

　　C. The;不填 D. The; a

　　27.While watching television, __________.

　　A.the doorbell rang

　　B.the doorbell rings

　　C.we heard the doorbell ring

　　D.we heard the doorbell rings

　　28.-Shall we go to the art exhibition right away?

　　A.It’s your opinion

　　B.I don’ t mind

　　C.It’s all up to you

　　D.That’s your decision

　　29. _________ in the regulations that you should not tell other people the password of your e-mail account.

　　A. What is required

　　B. What requires

　　C. It is required

　　D. It requires

　　30. Some researchers believe that there is no doubt ______ a cure for AIDS will be found.

　　A. which B. that

　　C. what D. whether

　　答案：(1-5)DABCD (6-10)AAACB (11-15)CBBBC

　　(16-20)BDBBC (21-25)BDDBD (26-30)ACCCB