单项选择题

The director of the research institute came in person to ______ that everything was all right.

A．make out
B．make sure
C．make clear
D．make up
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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
单项选择题
Beth could ______ her coat easily because it has large red buttons.
A．justify
B．identify
C．prove
D．test
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