题文
Please ______ the lights when you go out．（ ）
| A． |
turn down |
B． |
turn up |
C． |
turn on |
D． |
turn off |
Please ______ the lights when you go out．（ ）
| A． |
turn down |
B． |
turn up |
C． |
turn on |
D． |
turn off |
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