阅读短文，理解判断。
I have a farm. There are many animals on my farm. The horses and the cows are in the field. The ducks are swimming in the pond. Some chickens are behind the house. The pigs are sleeping in the mud. The dog is under the tree.
（1）The farm is big.
（2）There are many animals on my farm.
（3）The pigs are in the river.
（4）The ducks are swimming.
（5）The cats is under the tree.