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科目： 來源：不詳 題型：單選題


Every possible means _______ been taken to prevent the river _________.
A．have; pollutingB．has; polluted
C．has; from being pollutedD．have; being polluted

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科目： 來源：不詳 題型：單選題


Where she will go and when she will leave _____ what I want to know.
A．isB．wereC．wasD．a(chǎn)re

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科目： 來源：不詳 題型：單選題


When she realized that the bike______towards her, she quickly turned aside.
A．ranB．was runningC．had runD．has run

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科目： 來源：不詳 題型：單選題


－Hi, I didn't know you had come back! Have you finished your teaching in America?
－Yes. I______Chinese there for more than two years.
A．have been teachingB．was teachingC．taughtD．had taught

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科目： 來源：不詳 題型：單選題


-Did you attend Mary and Tom’s wedding ceremony?
-Yes，but as you know，they________each other no more than 3 months．
A．knewB．had knownC．have knownD．have been knowr

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科目： 來源：不詳 題型：單選題


-I give up．It’s too hard．
-Really? I______you could make it through．
A．thinkB．thoughtC．have thoughtD．a(chǎn)m thinking

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科目： 來源：不詳 題型：單選題


It was a pity that he __________ blind, but to the joy of his family, his dream of becoming a musician __________ true at last.
A．came; cameB．went; wentC．came; wentD．went; came

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科目： 來源：不詳 題型：單選題


Thanks to the policy, birth rates in the country_____ 2 percent annually for the past five years.
A．have been risen
B．have been rising
C．a(chǎn)re rising
D．a(chǎn)re risen

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科目： 來源：不詳 題型：單選題

Have you prepared for the sports meeting which ___soon?
A．has taken place B．will be taken place
C．is to take place D．is to be taken place

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科目： 來源：不詳 題型：單選題


Your pen________smoothly. Where did you buy it?
A．writesB．is writtenC．wroteD．was written

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