问题补充：
----- ----By bus.
A. How does he go to work?
B. Why does he go to work?
C. When does she go to work?
D. Where does he work?
答案：
(答案→)A. How does he go to work?
B. Why does he go to work?
C. When does she go to work?
D. Where does he work?
解析：回答语表示的是交通工具的方式，对此提问的用how，故本题选A。
