用be的正确形式填空。
1. There _________ a piano against the wall.
2. There _________ some flowers on the desk.
3. There _________ some tea in the cup.
4. There _________ two tins of coke in the bag.
5. There _________ three buildings and a beautiful garden in our school.
6. There _________ some meat, some bread and some apples on the table.
7. There _________ a picture and a clock on the wall.
8. There _________ a volleyball match in our school the day after tomorrow.
9. There _________ no factories, hospitals and schools here fifty years ago.
10. There may ________ something wrong with your watch.
11. There ________ any mail for you today.
12. There ________ any letters in the mailbox today.
13. How many kinds of animals ________ there in this area?