问题补充：
—Im doing a survey. Could you tell me ?
—Sure. I usually go to work at 7:00 am.
A. why you go to work
B. how you go to work
C. when you go to work
D. who you go to work with
答案：
A. why you go to work
B. how you go to work
(答案→)C. when you go to work
D. who you go to work with
解析：考查宾语从句的用法。由下文句意“我通常在7点去上班”可知，上文提问的是上班的时间。故选C。
