题目内容
into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
A.Put B.Putting C.Having put D.Being put
A
解析: 本题考查非谓语动词。首先排除B,C两个选项,因为热线是被投入使用,然后分析比较A,D两个选项,D选项表示正在被投入使用,与时间状语不吻合。如果考生指代过去分词可以作时间状语的话,那么本题可以直接找出答案,本句话可以改为:(when it was)put into use in April 2000. the hotline means for residents reporting water and heating supply breakdowns.
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