题目内容
19.People should try to save electricity bynot leaving (not leave) lights on when they are not needed.分析 当人们不需要灯的时候应该通过不开灯的方式努力节约用电.
解答 答案:not leaving
联系语境,根据关键词by为介词,表方式;结合给出的提示词not leave可知此处应用动词leave的否定意义,此句的意思是"通过不开灯的方式";由于跟在介词by的后面,所以应用动词leave的动名词形式,在这里即为否定形式not+doing,leave的动名词为leaving.故填写:not leaving
点评 此题考查by作为方式介词的用法.注意联系句意并结合语法规则便可轻松做出正确答案.
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