Глагол to be 1. I _ 7. 2. It_a book. 3. We_ pupils. 4. Ann_my sister. 5.You_from England. 6. The dog_black. 7. Tom and Liz_good friends.
1. I am 7; 2. It is a book; 3. We are pupils; 4. Ann is my sister; 5. You are from England; 6. The dog is black; 7. Tom and Liz are good friends.