1) 1-is, 2-am,3-was,4-has,5-have,6-are,8-are

2) favorite subject, foreign language, three-room flat, interesting book, large family

3) 1-4, 2-5, 3-2, 4-1, 5-3

4) Are we first year students?  Does my friend have a dog? Are there two windows in this room?

We are not first year students. My friend doesn't have a dog. There are not two windows in this room.

5) colors

6) chair