People wear uniforms for special occasions at__.A.time B.times C.timed为什么?

问题描述:

People wear uniforms for special occasions at__.
A.time B.times C.timed
为什么?

B at times 有时,间或,时不时地."人们有时侯在特殊场合穿制服"
另外两个都没有那样的搭配