My son is worried _______ his math exam. [ ]A. to B. at C. about

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My son is worried _______ his math exam.    [     ]
A. to
B. at
C. about
D. in

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举一反三

I"d like to stay _______  my mother, I miss her.    [     ]
A. with
B. at
C. by
D. from

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______dinner, you must wash your hands.    [     ]
A. When
B. Before
C. After
D. Until

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Everyday there is news _______ TV and _______ news paper.      [     ]
A. in, on
B. on, in
C. on, at
D. at, in

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It"s quite cold today. The temperature will fall _______ zero at night.     [     ]
A. down
B. below
C. above
D. over

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Is it a fine day _______ a walk?     [     ]
A. for
B. to
C. with
D. on

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