列车信号复示器在信号机关闭时呈圆形（），信号机开放时其圆形颜色与信号机显示一致。
A、红色
B、兰色
C、青色
D、黄色
参考答案：A
They often paly _______ on the badminton court.[ ]
A. badminton
B. basketball
C. football
D. volleyball
A luxury express train jumped the tracks on a bridge in eastern India, killing at least 50 on the spot. According to the Northern Railway spokesman, the death () is expected to rise.
A. figure
B. toll
C. span
D. yield
