单项选择题

To test his theory, the chemist （）an experiment.

A. set up
B. set out
C. set forth
D. set in

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单项选择题

The task won’t feel so （）if you break it down into small, easy-to-accomplish steps.

A. confusing
B. sobering
C. overpowering
D. exciting

单项选择题

Now illegal copies of music CDs（）losses of about $300 million in sales annually and $ 65 million lost government tax revenue.

A. conflict
B. inflict
C. compromise
D. defer

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