—I haven't seen Lucy for three days. Is she ill?

—______. Her sister told me she was in hospital. [ ]

A. I hope not

B. I'm afraid so

C. I don't expect so

D. I'm afraid not.

符合减价优待条件的学生无票乘车时，应（）。

A.补收学生票款，核收手续费

B.除按规定补收学生票款，核收手续费外，还必须加收应补票价50%的票款

C.按一般旅客办理

D.补收全价票价与半价票的差额，并核收手续费