动词部分
　　1. While people may refer to television for up-to-the-minute news, it is unlikely that television ______ the newspaper completely.
　　A. replaced B. have replaced C. replace D. will replace
　　2. The fifth generation computers, with artificial intelligence, ______ and perfected now.
　　A. developed B. have developed
　　C. are being developed D. will have been developed
　　3. It’s 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
　　4. 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
　　5. 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
　　6. Until then, his family ______ from him for six months.
　　A. didn’t hear B. hasn’t been hearing
　　C. hasn’t heard  D. hadn’t heard
　　7. The conference ______ a full week by the time it ends.
　　A. must have lasted  B. will have lasted
　　C. would last  D. has lasted
　　8. As ______ announced in today’s papers, the Shanghai Export Commodities Fair is also open on Sundays.
　　A. being B. is C. to be D. been
　　9. 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
　　10. 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. is leaking
　　C. leaked  D. has been leaking

　　11. Once environmental damage ______, it takes many years for the system to recover.
　　A. has done B. is to do C. does D. is done
　　12. Neither of the young men who had applied for a position in the university ______.
　　A. has been accepted B. have been accepted
　　C. was accepted  D. were accepted
　　13. The last half of the nineteenth century _____ the steady improvement in the means of travel.
　　A. has witnessed  B. was witnessed
　　C. witnessed  D. is witnessed
　　14. If she doesn’t tell him the truth now, he’ll simply keep on asking her until she _____.
　　A. does B. has done C. will do D. would do
　　15. My train arrives in New York at eight o’clock 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
　　16. A thief who broke into a church was caught because traces of wax, found on his clothes, ______ from the sort of candles used only in churches.
　　A. had come B. coming C. come D. that came
　　17. She ought to stop work; she has a headache because she ______ too long.
　　A. has been reading  B. had read
　　C. is reading  D. read
　　18. This kind of glasses manufactured by experienced craftsmen ______ comfortably.
　　A. is worn B. wears C. wearing D. are worn
　　19. ―“May I speak to your manager Mr. Williams at five o’clock tonight?”
　　―“I’m sorry. Mr. Williams ______ to a conference long before then.”
　　A. has gone  B. had gone
　　C. would have gone  D. will have gone
　　20. By the time he arrives in Beijing, we ______ here for two days.
　　A. have stayed B. shall stay
　　C. have been staying D. will have stayed