It is the second day of Mid-autumn Festival vacationbreak.

Usually we say like, winter break, thanksgiving break, christmas break, spring break, summer break, etc., and only use 'vacation' for summer vacation.

I went to the supermarket and wanted to buy some fruit, but they wereit was so expensive.

Here, 'fruit' is actually singular, as you're using it as a 'mass noun.'

As soon as it isthe festival arrives, the price of food and fruit rises.

And I don't like most of the festivals, because there are so many traditional rules.

I just want to stay alone, socializing is too tireding for me.

I feel the same way sometimes! In English you can probably call yourself an 'introvert.'

Tomorrow will be the last day of the vacationbreak, I'm gonna miss it.