单项选择题

Please put up your bands if you have any questions.

A. raise
B. reach
C. wave
D. fold
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单项选择题
Techniques to employ the energy of the sun are being developed.
A. convert
B. store
C. use
D. receive
单项选择题
Finding a job can be depressing and disappointing, and therefore it is important that you are prepared.
A. exploiting
B. frustrating
C. profiting
D. misleading
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