问题
选择题
You should ___ the lights if there is no one in the room.
A．turn out
B．turn off
C．go back
D．go on
答案
答案：B
turn off意为：关（电灯、收音机）等。
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You should ___ the lights if there is no one in the room.
A．turn out
B．turn off
C．go back
D．go on
答案：B
turn off意为：关（电灯、收音机）等。