单项选择题

Farmers are allowed to grow small gardens of their own and they sell their vegetables（）the black market.

A. on
B. at
C. in
D. for

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单项选择题
Jack is so（）to his appearance that he never has his clothes pressed.

A. adverse
B. anonymous
C. indifferent
D. casual
单项选择题
I was hoping Mr. Brown could（）for a few days.

A. put me in
B. put me down
C. put me on
D. put me up
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