More goodies!

May I offer my comment on unit 2?

There is a plural typo in
หน่วยย่อยที่  1  : How many chair are there in the classroom?
[We can look at 'chairs in the classroom' as a 'noun clause' and ask "How many chairs in the classroom are there?"]

Some punctuation typos elsewhere. For examples: comma (', '), fullstop ('. '), question mark ('? '), colon (': ') and so on should follow immediately after a word. Please note a space after each of the punctuation marks.

หน่วยย่อยที่  3  "When do you study English?"
Usually, 'study' applies to an object or a subject eg. a book, law, and maths. A study may be done in 'lessons' or small periods of study as in classes. So, we may ask 'When is your English class?' or 'When are your English classes?'

"1.  When do you study English?
     It's in ..."
The question expects an answer in the form of "I study English [a time clause]."