阅读理解，根据上下文意思选择正确的答案。
It is a nice day. John and Jim go to a nature park. There is a big forest in the park. There is a beautiful lake
near the forest and they can see some fishes in the lake. There is a bridge over the river in front of the lake. They
take some pictures on the bridge. They want to climb the mountains, but they have no time.
1. Are there any trees in the park?
A. Yes, there are.
B. No, there aren't.
2. What do they do on the bridge?
A. They go fishing.
B. They take some pictures.
3. Is there a lake near the forest?
A. Yes, there is.
B. No, there isn't.
4. Are there any fish in the lake?
A. Yes, there are.
B. No, there aren't.
5. Do John and Jim climb the mountains?
A. Yes, they do.
B. No, they don't.
