Let me tell you something about our park.It's not very big but beautiful .Here's the gate .We can go into  the park from here. On the left of it, there are two toilets .There is a cafe on the right .We can drink coffee there. There is a big tree near it. In the tree, there are many birds. In the middles of the park ,there is a playground .There are many boys and girls on it .Some are flying kites, and others are dancing. They are happy. Near the playground, there is a nice and big lake .There are many boats on it. How many trees are there in the park?   _  .
One two three four