大学英语四级词汇与结构（五）

　　七。 情态动词+完成形式、时态的考点1. We _____ our breakfast when an old man came to the door. A） just have had B） have just had C） just had D） had just had 2. You _____ all those calculations！ We have a computer to do that sort of thing. A） neednt have done B） must not have done C） shouldnt have done D） can not have done 3. By the end of this month， we surely _____ a satisfactory solution to the problem. A） have found B） will be finding C） will have found D） are finding 4. It seems oil _____ from this pipe for some time. We ll have to take the machine apart to put it right. A） had leaked B） has been leaking C） leaked D） is leaking 5. Once environmental damage _____， it takes many years for the system to recover. A） is done B） is to do C） does D） has done 6. Marys score on the test is the highest in her class； she ______ have studied very hard. A） may B） should C） must D） ought to 7. With all this work on hand， he _____ to the cinema last night. A） mustnt go B） wouldnt go C） must D） ought to 8. He came back late， ______ which time all the guests had already left. A） after B） by C） at D） during 9. It was very kind of you to do the washing up， but you _____ it. A） mustnt have done B） wouldnt have done C） mightnt have done D） didnt have to do 10. You _____ her in her office last Friday； shes been out of town for two weeks. A） neednt have seen B） must have seen C） might have seen D） cant have seen 11. the fifth generation computers， with artificial intelligence， _____ and perfected now. A） developed B） have developed C） are being developed D） will have been developed 12. Its reported that by the end of this month the output of cement in the factory_____ by about 10%. A） will have risen B） has risen C） will be rising D） has been rising 13. Sir Denis， who is 78， has made it known that much of his collection_____ to the nation. A） has left B） is to leave C） leaves D） is to be left 14. Before the first non-stop flight 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 15. The room is in a terrible mess； it_____ cleaned. A） cant have been B） shouldnt have been C） mustnt have been D） wouldnt have been 16. Until then， his family_____ from him for six months. A） didnt hear B） hasnt been hearing C） hasnt heard D） hadnt heard 17. The conference_____ a full week by the time it ends. A） must have lasted B） will have lasted C） would last D） has lasted 18. Great as Newton was， many of his ideas_____ today and are being modified by the work of scientists of our time. A） are to challenge B） may be challenged C） have been challenged D） are challenging 19. Id rather read than watch television； the programs seem_____ all the time. A） to get worse B） to be getting worse C） to have got worse D） getting worse 20. My train arrives in New York at eight oclock tonight. The plane I would like to take from there_____ by then. A） would leave B） will have left C） has left D） had left 21. Research findings show we spend about two hours dreaming every night. No matter what we_____ during the day. A） should have done B） would have done C） may have done D） must have done 22. He must have had an accident， or he_____ then. A） would have been here B） had to be here C） should be here D） would be here 23. It was essential that the application forms_____ back before the deadline（截止日期）。

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　　A） must be sent B） would be sent C） be sent D） were sent 24. We desire that the tour leader_____ us immediately of any change in plans. A） inform B） informs C） informed D） has informed 25. Look at the terrible situation I am in！ If only I_____ your advice. A） follow B） had followed C） would follow D） have followed 26. It is recommended that the project_____ until all the preparations have been made. A） not be started B） will not be started C） is not started D） is not to be started 27. We didnt know his telephone number， otherwise we_____ him. A） had telephoned B） must have telephoned C） would telephone D） would have telephoned 28. Had he worked harder， he_____ the exams. A） must have got through B） would get through C） would get through D） would have got through 29. I dont think it advisable that Tim_____ to the job since he has no experience. A） be assigned B） will be assign C） is assigned D） has been assigned 30.If the whole operation_____ beforehand， a great deal of time and money would have been lost. A） was not planned B） has not been planned C） had not been planned D） were not planned 31. as commander-in-chief of the armed forces， I have directed that all measures_____ for our defense. A） had been taken B） would be taken C） be taken D） to be taken 32. We are all for your proposal that the discussion ______. A） be put off B） was put off C） should put off D） is to put off 33. ______ for my illness， I would have lent him a helping hand. A） Not being B） Had it not been C） Without being D） Not having been 34. To be frank， Id rather you _____ in the case. A） will not be involved B） not involved C） not to be involved D） were not involved 35. It is politely requested by the hotel management that radios_____ after 11 oclock at night. A） were not played B） not to play C） not be played D） did not play 36. Jean doesnt want to work right away because she thinks that if she_____ a job she probably wouldnt be able to see her friends very often. A） has to get B） were to get C） had got D） could have got 37. _____ right now， she would get there on Sunday. A） Would she leave B） If she leaves C） Were she to leave D） If she had left 38. Its already 5 oclock now. Dont you think its about time _____？

　　A） we are going home B） we go home C） we went home D） we can go home 39. _____ before we depart the day after tomorrow， we should have a wonderful dinner party. A） Had he arrived B） Would they arrive C） Were they arriving D） Were they to arrive 40. It is important that enough money_____ to fund the project. A） be collected B） must be collected C） was collected D） can be collected

　　答案：DACBA CDBDD CADCA DBCBB CACAD ADDAC CABDC BCCDA