Just one more thing.

Question

Which of the following sentences are grammatical?
Thank you very much for your cooperation.

1.I spent most of my holiday at home.
2. I spent the greatest part of my holiday at home.
3. I mainly/mostly stayed at home during my holiday.
4.For the most part, I spent my holiday at home.
5. Could you tell me what the weather will be like tomorrow?

Answer 1

All of them look grammatically correct to me.

For 3, both mainly and mostly work, but mostly is a better word for what you are trying to say.