题目内容
16.In general,_______ energy,we turn off the lights for Earth Hour on the last Saturday in March.( )A. | saved | B. | saving | C. | to save | D. | having saved |
分析 为节约能源,我们每年三月最后一个星期六关灯一小时.
解答 答案:C.根据题意可知此题考查to do不定式做目的状语.答案A为过去式时不能做状语、是过去分词时其后不可跟宾语;答案B和D为现在分词,一般做伴随状语表主动,不能做目的状语.
点评 做此题时注意不定式、现在分词做状语时的区别.
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