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nish24. Years ago we didn’t know this, but recent science ___that people who don’t sleep well soon get ill.a. showed b. has shown c. will show d. is showing25. 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 on26. He will have learn English for eight years by the time he ______ from the university neat year.a. will graduate b. will have graduate c. graduates d. is to graduate27 Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly.a. is changing b. has changed c. will have changed d. will change28. I _____ the piano quite well, but I haven’t had time to play since the new year.a. will play b. have played c. played d. play29. Can I help you, sir? Yes, I bought this puter here yesterday, but it ______.a. didn’t work b. won’t work c. can’t work d. doesn’t work30. You don’t need to describe her. I ______ her several times.a. has met b. have met c. met d. meet31. I’m sorry to keep you waiting. Oh, not at all. I _____ here only a few minutes.a. have been b. had been c. was d. will be32. I don’t really work here。 I ______ until the new secretary arrives.a. just help out b. have just helped out c. am just helping out d. will just help out33. Is this raincoat yours? No, mine ______ there behind the door. a. hangs b. has hung c. is hanging d. hung34. Who is Jerry Cooper? ______? I saw you shaking hands with him at the meeting.a. Don’t you meet him yet b. Hadn’t you meet him yetc. Didn’t you meet him yet d. Haven’t you meet him yet