单项选择题

Other specific properties ______ equal, iron heats up faster than aluminum.

A．be
B．being
C．is
D．are
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单项选择题
The president was expected to ______ some suggestions after reading all those reports.
A．come up with
B．put up with
C．catch up with
D．keep up with
单项选择题
This small village is made up of 200 families ______ five nationalities.
A．belonged
B．belonged to
C．belonging
D．belonging to
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