________ in a red dress, she was easy to _______ in the big crowd.

A．Being dressed; pick out

B．Dressed; pick out

C．Dressed; be picked out

D．Having dressed; pick out

四显示自动闭塞区段通过信号机显示一个绿色灯光和一个黄色灯光，准许列车按规定速度运行，要求注意准备减速，表示前方又（）闭塞分区空闲。