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
It is out of the questionthat the inspector will come tomorrow.
A．impossible
B．possible
C．probable
D．likely
单项选择题
His sole motivewas to make her happy.
A．aim
B．argument
C．capability
D．pursuit
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