单项选择题

Children are always curious ______ everything they see.

A. to

B. for
C. on

D. about
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单项选择题
Soon he got () his difficulties and succeeded.

A. across
B. away
C. over
D. through
单项选择题
You () your own sandwiches. I have enough for two.

A. couldn't have brought
B. shouldn't have brought
C. mustn't have brought
D. needn't have brought
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