_____ into use in April 2000, the hotlin
题型:选择题
问题:
_____ 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
_____ 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