7) 1 an interesting collection
2 a difficult translation
3 a group of Russian students
4 an ill classmate
5 a new magazine
6 an old newspaper
7 they had a picnic on Sunday
8 are you going to visit ill friend?
9 it's cold? Don't take off the hat, please
9) 2 yes, he is
3 no, she isn't. She is playing on her computer
4 no, he isn't. He is playing with his ball
5 no, she isn't. She is reading a book
6 no, he isn't. He is watching tv