单项选择题

This paper is not free ! I’d appreciate it if everyone would start trying to()it.

A. use
B. produce
C. move
D. conserve

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单项选择题
As all the members of my family like country life, we decided to()farming.

A. go in for
B. go back on
C. go through with
D. go along with
填空题
The lecture will be useful for students who are writing ______.
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