Question

--How often do you attend the evening classes?
---_____, three times per week.

A．On the whole

B．On average

C．Little by little

D．In all

Answer 1

B

短语辨析。   A整体来说； B. 普通，通常；  C. 逐渐地 D.总共，合计。句意：你多久上一次夜校课程？——通常每周三次。故选B。