Два угла трапеции относятся как 7:11, а два других - равны. Найдите углы трапеции.

rewrite the following  sentences in the  negative form

1. There are some   bookshelves on the wall.

2. There is a cloc on the table 

3. There are four desk in the room

4. There  are some books in the bags.

5. There are two beds  in our room .

6 There is tape -recorder on the table.

7. There is a chair at the table

Rewrite the following sentences in the plural

1 There is tape- recorder on the  table

2 There is a book on the desk.

3 There is a bad and a chair here

4 is there a Russian book on your desk

5 is there a bag on the chair

6 There is not  any picture on the woll

7  is there a clock in the room