根据对话内容，从方框内选择词的适当形式填空，每空只能填一词，每个词只能用一次。

interesting     protect    danger    they    panda

A: Did you like the zoo?
B: Yes, I was so excited to see the 1___________! They were so cute.
A: It was 2____________to learn about the Wolong Panda Reserve.
B: But it’s sad to think about all those animals in 3___________. It makes me mad!
A: The surprising thing is to hear how many animals are in danger.
B: I think we need to 4____________ them better.
A: Let’s find out what we can do to save 5_____________.