Every one of us can make a great efforts to cut 【M1】______ off the use of energy in our country. To begin with, all 【M2】______ o

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问题 Every one of us can make a great efforts to cut 【M1】______
off the use of energy in our country. To begin with, all 【M2】______
of us can start reducing to the use of oil by driving only 【M3】______
when we have a real need. That won’t be easy, I know, 【M4】______
but we have to start anywhere. What’s more, we can go to 【M5】______
work by bike once and twice a week, and we can also buy 【M6】______
smaller cars that burn less oil. Other way is to watch our 【M7】______
everyday use of water and electric at home. For example, 【M8】______
how many times have you walked out a room and leave the 【M9】______
lights or television when no one else was there? 【M10】______
【M9】

选项

答案leave一left。

解析 leave和前面的walked并列,要用过去分词。
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