单项选择题

Techniques to employ the energy of the sun are being developed.()

A. convert
B. store
C. use
D. receive

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单项选择题
I enjoyed the play-it had a clever plot and very funny dialogues．
A．long
B．boring
C．original
D．humorous
单项选择题
The latest census is encouraging.()

A. statement
B. assessment
C. evaluation
D. count
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