I want to sleep

It is currently 8 PM. I ate a hambuger, so now I wish to sleep.
However, I have a lot of things to study. Kkee (?)
I want to Zzz.

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I also get tired after I eat burgers for some reason.

Your paragraph made enough sense, but I figured I'd throw in a correction just for your reference.

Good job! :)

I want to sleep.

Now It is 8 PM. I ate a hambuger, so I wish to sleep.
But I have much many things to study. Kkee
I want to Zzz.

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Very well done! Minor grammar mistakes.

Hamburgers are good, right?