单项选择题

There is no risk to public health.

A. point
B. danger
C. chance
D. hope
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单项选择题
Please put up your hands if you have any questions.
A. raise
B. reach
C. wave
D. told
单项选择题
Mark proved to be a very competent manager.
A. efficient
B. successful
C. competitive
D. capable
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