一道英语选择题,求老师学霸帮忙!谢谢

问题描述:

一道英语选择题,求老师学霸帮忙!谢谢
the police are working hard to keep our city____ all the time.
A.save
B.being safe
C.safe
D.safely

Csafe 安全的.
根据题意,使城市安全