20.______________many children on the hill.

用所给词的适当形式填空　

19.David's friends___________some tents.

18.David__________a telescope.

17.______________a map of the world on the wall.

16._____________some maps on the wall.

15.My parents___________some nice pictures.

14.How many students____________in the classroom?

13._______________any flowers in the vase?

12._______________a story-book on the table.

11.My father_________a story-book.