一How can we reduce C02 in our home?
一It’s easy． off your TV or puters when you’re not using
them and you’ll greatly reduce it．
A. Turn
B. To turn
C. Turning
D. Turned
网友回答
(答案→)A. Turn
B. To turn
C. Turning
D. Turned
解析：考查固定句型。固定句型：祈使句+连词+陈述句=If条件句，主句。本题Turn off your TV or puters when you’re not using them and you’ll greatly reduce it．=If you turn off your TV or puters when you’re not using them, you will greatly reduce it.故A正确。