I can not sleep on the night.I take a big exam（合并成一个句子）

I can not sleep on the night.I take a big exam（合并成一个句子）
I can not sleep on the night.I take a big exam（合并成一个句子）

I can not sleep on the night.I take a big exam（合并成一个句子）
I take a big exam ,so I can't sleep.
I can't sleep,because I have a big exam.
I can't sleep for a big exam.

I can not sleep on the night because I will take a big exam

I will take a big exam so that i can not sleep all the night

I can not sleep on the night because I will take a big exam.
I will take a big exam so I can't sleep on the night.
I can't sleep for a big exam on the night.

to take a big exam,i can not sleep on the night

I can not sleep on the night because I will take a big exam.