To finish the work in time,he should work harder.(划线部分提问)下划线加在To finish the work in time

问题描述:

To finish the work in time,he should work harder.(划线部分提问)
下划线加在To finish the work in time

Why should he work harder?

what should he work harder for?
这题目的句子不好。。。。

what should he work harder for?
Why should he work harder?