题文
—Do you know the activity called “________ Lights” ?
—Oh,it’s an activity that reminds people of saving energy.
| A．Turn on | B．Turn down |
| C．Turn off | D．Turn up |
—Do you know the activity called “________ Lights” ?
—Oh,it’s an activity that reminds people of saving energy.
| A．Turn on | B．Turn down |
| C．Turn off | D．Turn up |
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