单项选择题

How much of your country's electrical supply is ______from water power

A．deduced
B．derived
C．detached
D．declined
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单项选择题
Although a teenager, Fred could resist______ what to do and what not to do.
A．being told
B．telling
C．to be told
D．to tell
单项选择题
I bought an alarm dock with a(n)______ dial, which can be seen dearly in the dark.
A．audible
B．amplified
C．supersonic
D．luminous
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