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21. A) He doesnt know where his brother keeps his computer. B) The woman should buy a used computer. C) He doesnt know how much computers cost D) His brother paid too much for the computer. 22. A) The doctor can see the man this week. B) Appointments must be made two weeks in advance. C) The man should call back on Friday. D) The doctor canceled his appointments on Friday. 23. A) He started the semester in a bad mood. B) Hes not usually bad-tempered. C) He has few responsibilities. D) He doesnt like the man. 24. A) He might go to the movies when he finished studying. B) He doesnt know if he can concentrate on a movie. C) He needs to stop studying for a while. D) He cant think about anything but studying. 25. A) He forgot to cancel the reservation. B) They can go to the restaurant after the woman has finished working. C) He has to work late tonight. D) They dont have a reservation at the restaurant. 听力原文： 21. W：What do you think would be a reasonable price to pay for a new computer? | 
