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1、[单选题]_______ such heavy pollution already, it may now be too late to clean up the river.
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A.Having suffered
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B.Suffering
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C.To suffer
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D.Suffered
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2、[单选题]I had hoped to see her off at the station, but I _____ too busy.
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A.was
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B.had been
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C.would be
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D.would have been
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3、[单选题]Unfortunately, when I dropped in, Professor Smith _____, so we only had time for a few words.
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A.has just left
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B.had just left
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C.just left
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D.was just leaving
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4、[单选题]We agreed _______ here but so far she hasn’t turned up yet.
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A.having met
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B.meeting
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C.to meet
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D.to have met
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5、[单选题]What do you think made Mary so upset? —_______ her new bike.
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A.As she lost
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B.Lost
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C.Losing
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D.Because of losing
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6、[单选题]They haven’t arrived yet but we _____ them at any moment.
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A.are expected
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B.have expected
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C.are expecting
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D.will expect
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7、[单选题]I think you must be mistaken about seeing him at the theatre; I’m sure he _____ abroad all week.
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A.is
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B.was
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C.has been
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D.had been
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8、[单选题]The purpose of new technologies is to make life easier, _______ it more difficult.
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A.not make
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B.not to make
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C.not making
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D.do not make
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9、[单选题]It is said that in Australia there is more land than the government knows _______.
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A.it what to do with
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B.what to do it with
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C.what to do with it
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D.to do what with it
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10、[单选题]The research is so designed that once _______ nothing can be done to change it.
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A.begins
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B.having begun
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C.beginning
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D.begun
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11、[单选题]Your mother _____, however, say that to us that day.
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A.does
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B.did
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C.is doing
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D.was doing
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12、[单选题]When I handed the report to John, he said that George was the person _______.
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A.to send
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B.for sending it
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C.to send it to
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D.for sending it to
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13、[单选题]The patient was warned _______ oily food after the operation.
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A.to eat not
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B.eating not
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C.not to eat
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D.not eating
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14、[单选题]_______ in thought, he almost ran into the car in front of him.
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A.Losing
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B.Having lost
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C.Lost
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D.To lost
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15、[单选题]I’m going to the supermarket this afternoon. Do you have anything ________ ?
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A.to be buying
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B.to buy
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C.for buying
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D.bought
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