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1、[单选题]Most environment problems exist because adequate measures for preventing them ____ taken in the past.
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A.was not
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B.were not
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C.were not being
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D.had not been
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2、[单选题]How long ______ to finish your composition?
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A.will it take you
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B.will take you
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C.you will take it
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D.you will take
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3、[单选题]I'd rather that you _________ here
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A.aren't
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B.wasn't
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C.weren't
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D.be
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4、[单选题]There ______ in the house where Marc has been staying.
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5、[单选题]The boy fell in front of the car but fortunately the driver stopped ______ time.
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6、[单选题]All the students in this class are of ___ age ___ me—sixteen.
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A.the same…to
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B.same…to
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C.the same…as
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D.same…as
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7、[单选题]Everybody agreed,____?
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A.didn’t they
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B.didn’t it
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C.did they
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D.did it
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8、[单选题]The discussion was so long and exhausting that _______ the speakers stopped for refreshments.
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A.at large
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B.at intervals
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C.at ease
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D.at random
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9、[单选题]It is useful to be able to predict the extent ___ which a price change will affect supply and demand
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10、[单选题]The clock was _______ eleven when I went upstairs to bed
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A.striking
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B.beating
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C.ringing
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D.sounding
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11、[单选题]The _______ runner can run 2 miles in fifteen minutes.
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A.common
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B.usual
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C.average
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D.general
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12、[单选题]The doctor tried to ______ the patient with a new drug.
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A.recover
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B.heal
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C.treat
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D.handle
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13、[单选题]_______ in the dark,someone hit his head
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A.Sitting
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B.As sitting
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C.When he was sitting
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D.Sat
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14、[单选题]______all my work,I had a cup of coffee and went out.
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A.Finished
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B.Having finished
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C.Finishing
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D.To finish
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15、[单选题]Tom took an umbrella with him _____ it rained
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A.when
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B.until
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C.in case
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D.because
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