车站技术作业图表中调机动态代号待命的符号是（）。
A.Q
B.D
C.B
D.S
参考答案：B
----Hi. How’s it going?
-----______.
A．I don’t like it
B．I will go to school
C．Not bad
D．No
35. I think I can fix the car on Wednesday. ______, you’ll have to wait till Friday.
A．If ever
B．If possible
C．If so
D．If not
