23. 1.There … a dog under the sofa. 2.There … not a pen on the table. 3.There … six apples on the plate. 4.… there a book in the bag? 5.There … a lot of schools in our town.

31. 1.London is … capital. 2.London is … capital of Great Britain. 3. … dog 4.… orange 5.… red pen 6. … book is interesting

32. 1.There … a dog under the sofa. 2.There … not a pen on the table. 3.There … six apples on the plate. 4.… there a book in the bag? 5.There … a lot of schools in our town.