Who can tell me that the sentence which I wrote is right or wrong?语法上有什么错误么?

问题描述:

Who can tell me that the sentence which I wrote is right or wrong?语法上有什么错误么?
With a heard work,we must have a better repay!And we should think of ourselves that why we should study hard!

that 去掉就可以了.
who can tell me the sentence which i wrote is right or wrong?
下面一句
and we should think of ourselves that the reason we should study hard!能告诉我修改的原因么?that which 一般不会用在一句话里。