Ответ:
1) She is a teacher. They are (-) teachers.
2) It is a computer. They are (-) computers.
3) I have a car. They are cars.
4) There is a table in the office. The table is big.
5) It is a book. The book is interesting.
6) It is a picture. The picture is beautiful.
7) This is a car. The car is new.
8) I have a computer.
9) These are books. The books are interesting.
10) They are (-) children. The children are small.
11) They are (-) computers. The computers are old.
12) These are (-) flowers. The flowers are beautiful.
(-) это прочерк