一How can we reduce C02 in our home?
一It’s easy．________ off your TV or computers when you’re not using
them and you’ll greatly reduce it．
A．TurnB．To turnC．TurningD．Turned
A

試題分析：考查固定句型。固定句型：祈使句+連詞+陳述句=If條件句，主句。本題Turn off your TV or computers when you’re not using them and you’ll greatly reduce it．="If" you turn off your TV or computers when you’re not using them, you will greatly reduce it.故A正確。
點評：本題的句型是高考中非常重要的句式：祈使句+連詞+陳述句=If條件句，主句。還可以進一步轉(zhuǎn)化成：名詞短語，連詞+陳述句。
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