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【单选题】
The local commission on energy conservation found the number of residents using green energy in their homes is on the rise.
A.
an official group of people with the responsibility to control or find out about something
B.
an amount of money paid to someone for selling goods or services, which increases with the amount sold
C.
a piece of work that someone has been asked to do
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Some critics of tidal and wind energy argue that the power generation is intermittent and unreliable.
A.
the next stage of development
B.
the production of something
C.
all the people born around the same time
【单选题】The engine will have an open center that will allow animals to swim through.
A.
building or place used for a particular purpose or activity
B.
middle area of an object
C.
moderate political position between two extremes