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
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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