we go to work every day is obvious that is for life.A. HowB. WhatC. WhyD. When

问题补充：

we go to work every day is obvious, that is, for life.

A. How

B. What

C. Why

D. When

答案：

A. How

B. What

(答案→)C. Why

D. When

解析：重在理解句意：为什么我每天的得去上班是很明显的，那就是，为了生活。故选C。