I left my text book home which is about the TOEIC exam but luckily I found a piece of paper which is torn from a textbook of the TOEFL exam and some questions are on it. So I decided to work on writing some essay today. klingt das natürlich?

@DDabcc147 I edited my first response to remove the 'some' before essays in the last sentence. While it is not wrong to say some there, it doesn't sound great to use some twice in the same sentence. You could say either:

1) 'There are questions on it so I decided to work on writing some essays today'; or

2) 'Some questions are on it so I decided to work on writing essays today' (which is what I have put in my response).

You could also use a synonym of some to effectively say it twice without sounding weird, e.g. 'Some questions are on it so I decided to work on writing a few essays today' or 'There are a few questions on it so I decided to work on writing some essays today'.

The most important change I made is to put 'at' before home. I left my textbook AT home.

Also, in 99% of cases a sentence should only have one 'and' or 'but' in it. If you need to use and or but twice, you should instead start a new sentence.

Hopefully that helps! :)