单项选择题

Such crimes may be so complex that months or years go by before anyone （）them.

A. discovered
B. will discover
C. would have discovered
D. discovers

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单项选择题
The careless man received a ticket for speeding. He（） have driven so fast.

A. can’t
B. wouldn’t
C. shouldn’t
D. mustn’t
单项选择题
Though （） in a big city, Peter always prefers to paint the primitive scenes of country life.

A. grown
B. raised
C. tended
D. cultivated
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