– does your father go to work?-- By bus.A. HowB. WhatC. WhenD. Where

问题补充：

– does your father go to work?

-- By bus.

A. How

B. What

C. When

D. Where

答案：

(答案→)A. How

B. What

C. When

D. Where

解析：How如何，怎样；What什么；When什么时候；Where在哪儿。根据下文，乘公交车，可知上文问的是交通方式，故选A。