单项选择题

The teacher asked his students what oil was().

A．made of
B．made by
C．made up of
D．made from

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单项选择题
He is wet to the skin. It()heavily.

A．must be raining
B．must rain
C．may be raining
D．must have rained
单项选择题
Prices at present are reasonably stable, and will probably remain().

A．so
B．such
C．high
D．low
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