专四单选练习.doc

Exercises1. People __________ space for many years by studying light through their telescope.a. explored b. are exploringc. have been exploring d. will explore2. I __________ my letter by the time you come back.a. have finished b. shall finishc. shall have finished d. shall be finishing3. Engels said that what Darwin ___________ for biology was as great as what Marx __________ for history.a. had done…had done b. has done … has donec. did … did d. does … does4. The rest of the evening __________ singing and dancing.a. has given up to b. will give up toc. will be given up to d. are given up tp5. ___________, her heart was beating faster and faster.a. Listening to the coming footstepsb. As she listened to the coming footstepsc. When listening to the coming footstepsd. To the coming footsteps as she listened6. They are said __________ a simple method for producing plastics.a. to have found b. findingc. will find d. to be finding7. He was told that after he graduated he __________ by a company.a. would be employed b. would get employedc. would be employing d. would employ8. Since computers were invented, it ___________ that they are indispensable for scientific research.a. was thought b. has been thoughtc. had been thought d. has thought9. If you ___________ TV every night, of course your eyes will ache.a. sit and watch b. will sit and watchc. are to sit and watch d. sat and watched10. I __________ my breakfast when the morning post came.a. had b. had been having c. was having d. have been having11. If ________ to speak, he has no problem expressing himself.a. asking b. asked c. ask d. to be asked12. What do you think we shall do if it __________ on the day fixed for the sports meet?a. will rain b. rain c. rains d. is raining13. It was not until she had arrived home ___________ remembered her appointment with the doctor.a. when she b. that she c. and she d. than she14. _________ at the moment, I’ll go to the shop.a. For it doesn’t rain b. For it isn’t rainingc. As it doesn’t rain d. As it isn’t raining15. We had lived in this house for three years ___________ my father decided to have us move to a new neighborhood.a. while b. since c. before d. after16. When we said goodbye, I thought it was forever. But we __________ again, many years later, under very strange circumstances.a. were about to meet b. were to meetc. were meeting d. had met17. When she phoned I didn’t have much time to talk, because I ____________ for France in tow hours.a. left b. would have left c. had left d. was leaving18. Before the first non-stop flight was made in 1949, it __________ necessary for all planes to land for refueling.a. would be b. has been c. had been d. would have been 19. Sir Denis, who is 78, has made it known that much of his collection ___________ to the local museum.a. is left b. had been left c. is being left d. is to be left20. There was a knock at the door. It was the second time someone ____________ me that evening.a. interrupted b. had interrupted c. was interrupting d. would interrupt21. Don’t telephone me after eight. ____________ a dinner party.a. We’ve had b. We’re to have c. We’ll be having d. We’re having22. We’ll probably drive faster than ____________, so we’ll get there first and buy the tickets.a. you’re going to do b. you’ve donec. you’ll be doing d. you do23. The newspaper finally ceased publication since its circulation ____________ steadily over a period of years.a. had dropped b. has droppedc. dropped d. was dropping24. Many artists predict that this brilliant young actor ___________ to be a shining star.a. destines b. will be destined c. is destinedd. has been destined25. That’s a nice watch. I wish I ____________ one like it.a. have b. had c. have had d. can have26. I am not used ____________ to like that.a. to being spoken b. to speakc. being spoken d. to speaking27. No sooner had we reached the top of the hill __________ we all sat down to rest.a. than b. then c. when d. until28. I haven’t seen Mary these past few days; 。