摘要：1． turn down, turn up, turn on, turn off
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Please turn off the lights when you leave the classroom instead of keeping them ________．
[ ]
A．up
B．off
C．down
D．on
Don't turn ________ the radio, I'm listening to it. But it's too loud. Just turn it ________.
[ ]
|
A ．on up |
B ．off up |
|
C ．on down |
D ．off down |