— It’s time to go home, let’s go.
—Please _________ the light when you leave the classroom.
| A．turn on | B．turn off |
| C．turn down | D．turn up |
— It’s time to go home, let’s go.
—Please _________ the light when you leave the classroom.
| A．turn on | B．turn off |
| C．turn down | D．turn up |
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