问题
选择题
_____ 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
答案
答案:A
_____ 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
答案:A