摘要： 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 解析:put sth. into use “让--投入使用 .显然.put 和句子主语the hotline 构成被动关系.所以用表示被动的过去分词.C项只表示完成.不能表示被动.
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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
查看习题详情和答案>>___ 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
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______ 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
查看习题详情和答案>>