单项选择题

They didn’t realize how serious the problem was.

A. know
B. forget
C. doubt
D. remember
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单项选择题
There are only five minutes left, but the outcome of the match is still in doubt.
A. result
B. judgement
C. estimation
D. event
单项选择题
People from many places were drawn to the city by its growing economy.
A. fetched
B. carried
C. attracted
D. pushed
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