---How can we reduce CO2 in our home?
---It’s easy．______off your TV or computers when you’re not using them, and you’ll greatly reduce it．
| A．Turn | B．To turn | C．Turning | D．Turned |
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---How can we reduce CO2 in our home?
---It’s easy．______off your TV or computers when you’re not using them, and you’ll greatly reduce it．
| A．Turn | B．To turn | C．Turning | D．Turned |
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