单项选择题

The police have asked for the（）of the public in tracing the whereabouts of the missing child.

A．award
B．co-operation
C．position
D．helpfulness

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单项选择题
$50 billion might seem a lot of money, but it’s a mere ______ in terms of what global capital markets can and do absorb.
A. alms
B. belongings
C. hearsay
D. pittance
单项选择题
The industrial community should be close enough to the crowded centers but distant enough to reduce（）hazards.

A. potential
B. substantial
C. feasible
D. predictable
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