–How can you save electricity?
–____________.
A．By switching the lights B．By switching the lights on
C．By switching the lights off D．By switching the lights down
科目：初中英語 來源： 題型：
–How can you save electricity?
–____________.
A．By switching the lights B．By switching the lights on
C．By switching the lights off D．By switching the lights down
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