Fill in the blanks with the following words．(填一填)

1)There ________ a slide here before．

2)There ________ some trees before．

3)There ________ some flowers on the table now．

4)There ________ any ducks in the park before．

5)We ________ play basketball now．

6)I ________ swim before．But I can swim now．

7)There are ________ new students in our classroom．

8)Are there ________ trees in the garden?

9)There ________ a big ball here．