B. are been introducedР C. were introduced D. had been introducedР18. --- Where do you think ______ he ______ puter?Р --- Sorry. I have no idea.Р A. has; bought B. 不填; boughtР C. did; buy D. 不填; buysР19. Don’t bother to look for my dictionary --- it ______ some day.Р A. turns up B. has turned upР C. will turn up D. is going to turn upР20. --- What do you think of this kind of TV set, which ______ in Shanghai?Р --- Well, I don’t care about such things.Р A. was made B. is madeР C. has been made D. had been madeР21. --- Did he notice you enter the room?Р --- I don’t think so. He ______ to the radio with his eyes shut.Р A. listened B. was listeningР C. has listened D. had listenedР22. The plane ______ at 7:00 pm, so I have to be at the airport by 6:40 at the latest.Р A. has left B. would leave
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