21. Charles Babbage is generally considered ______ the first computer.

　　A. to invent B. inventing C. to have invented D. having invented

　　22. It is no use _____to come now. He is busy.

　　A. ask him B. to ask him C. that you ask him D. asking him

　　23. The murder was brought in, with his hands _______ behind his back.

　　A. being tied B. having tied C. to be tied D. tied

　　24. Mrs Smith warned her daughter ____ after drinking.

　　A. never to drive B. to never drive C. never driving D. never drive.

　　25. The computer centre, ______ last year is very popular among the students in this school.

　　A. open B. opening C. having opened D. opened.

　　26. Do you know the boy _______ under the big tree?

　　A. lay B. lain C. laying D. lying

　　27. Most of the artists ______ to the party 'were from South Africa.

　　A. invited B. to invite C. being invited D. had been invited

　　28. English is a language ______ in many countries.

　　A. spoken B. speaking C. be spoken D. to speak

　　29. "Can you read?" Mary said to the notice.

　　A. angrily, pointing B. and point angrily C. angrily, pointed D. and angrily pointing

　　30. There was a terrible noise _______ the sudden burst of Tight.

　　A. followed B. following C. to be followed D. being followed

　　31. ____ more attention, the trees could have grown better.

　　A. Given B. To give C. Giving D. Having given

　　32. _____their students, the famous teacher came into the hall.

　　A. Followed B. Followed by

　　C. Being followed D. Having been followed

　　33. Your flat needs _____ . Would you like me it for you?

　　A. to clean, to do B. cleaning, doing C. cleaning, to do D. to be cleaned, doing

　　34. Does your new secretary ____ short hand?

　　A. know to take B. know how to take C. know how take D. know how taking

　　35. Tommy had his big brother _____ his shoes for him.

　　A. to tie B. tie C. tied D. tying

　　36. Would you please ______ write on the textbooks?

　　A. don't B. not to C. not D. to not

　　37. I'd ______ the operation unless it is absolutely necessary.

　　A. rather not have B. rather not to have C. not rather had D. rather not having

　　38. Your mother and I are looking forward________ you.

　　A. of seeing B. for seeing C. to see D. to seeing

　　39. The girl couldn't_____ how red his face was.

　　A. help to notice B. be helping to notice C. be helping noticing D. help noticing

　　40. Excuse me, but it is time to have your temperature ______.

　　A. taking B. to take C. take D. Taken

　　参考答案：

　　1-10 CDDAB BAACB

　　11-20 BCADC BCCDB

　　21-30 CDDAD DAAAB

　　31-40ABCBB CADDD