单项选择题

They have to ______ production for lack of raw materials.

A．cut across
B．cut in
C．cut off
D．cut back
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单项选择题
Why does the professor think Ann would be interested in going to Yellow Stone
A．She is from Wyoming.
B．She needs the money.
C．She has been studying animal diseases.
D．Her thesis adviser is heading the project.
单项选择题
What are the students going to use a tape recorder for
A．To practice speaking slowly.
B．To record a voice from the television.
C．To play a speech by the professor.
D．To evaluate their own voices.
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