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- 91Experiments of this kind _______in both the U.S. and Europe well before the Second World War started.
A.have conducted
B.have been conducted
C.had conducted
D.had been conducted
开始考试练习点击查看答案 - 92--David, are you 1istening to me? ---Sorry, Dad. I _______ to make sense of what the reporter said.
A.was trying
B.have tried
C.am trying
D.tried
开始考试练习点击查看答案 - 93– Why you didn't handed in your exercise paper? –Sorry, but I ____ that it should be turned in today.
A.didn't know
B.hadn't known
C.haven't known
D.don't know
开始考试练习点击查看答案 - 94After school we went to the reading-room to do some reading, only to be told that it _____.
A.was decorated
B.had decorated
C.had been decorating
D.was being decorated
开始考试练习点击查看答案 - 95I ______along the pavement yesterday when some strangers came up and asked me the way to the police station.
A.is wandering
B.was wandering
C.has wandered
D.had wandered
开始考试练习点击查看答案 - 96—Has your father returned from Europe yet? —Yes, but he ______ here for only three days before his company sent him to Americ
A.A.was
B.has been
C.will be
D.would be
开始考试练习点击查看答案 - 97The government has taken some measures to prevent more trees from _______.
A.cutting down
B.cut down.
C.being cut down
D.been cut down
开始考试练习点击查看答案 - 98Our manager ________ for Shanghai in a few days and he has asked me to find out when the earliest plane ________ next Wednesday.
A.is leaving; takes off
B.will leave; is taking off
C.leaves; will take off
D.is to leave; is going to take off
开始考试练习点击查看答案 - 99Although the peak travel time for Chinese railway doesn't start until Jan 19 this year, people who're eager to get a seat on the train _______ already _______ their struggles.
A.are; starting
B.has; started
C.have; started
D.are; started
开始考试练习点击查看答案 - 100I didn't know your telephone number; otherwise, I ______ you long ago.
A.had rung
B.have rung
C.would have rung
D.would ring
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