After living twenty years in the USA，Mary finally decided to ______ American cit

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After living twenty years in the USA，Mary finally decided to ______ American citizenship.[     ]
A. concentrate on
B. apply for
C. look out for
D. appeal to

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举一反三

On hearing the news that her husband was killed by Pakistan separatists，the wife ______.[     ]
A. broke away
B. broke out
C. broke down
D. broke up

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Fewer people ______ to live in the north of the country.[ ]
A. insist
B. require
C. desire
D. request

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To keep healthy, Professor Wade   _   cycling as a regular form of exercise after he  retired.[     ]
A. took up
B. picked up
C. carried out
D. took on

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Standing at the top of the hill, we saw the train gradually _           and disappeared in the distance.      [     ]
A. swept up
B. picked up
C. put up
D. speeded up

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Plastic bags won"t be allowed to be used for free in the supermarkets. They can" t __________
easily, which does great harm to our environment.   [     ]
A. break off
B. break in
C. break down
D. break out

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