＿＿when we passed by its nest.

A．Up into the blue sky did the bird fly

B．Up into the blue sky the bird flew

C．Up into the blue sky flew the bird

D．Flew up into the blue sky the bird

当前正在实施的重庆市环保五大行动是蓝天、碧水、（）、田园和绿地行动？

A.和谐

B.美丽

C.宁静

D.无声