单项选择题

Techniques to harness the energy of the sun are being developed.

A. convert
B. store
C. utilize
D. receive
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单项选择题
In a bullfight, it is movement, not the color, of subjects that arouses the bull.
A. confuses
B. excites
C. scares
D. diverts
单项选择题
The minimum age of Chinese citizens who are eligible to vote is eighteen.
A. encouraged
B. enforced
C. entitled
D. expected
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