Mary: I’m now in the sea.I can’t believe it! it’s so beautiful! what a colorful fish!It’s so lovely! little fish,don’t go away!Oh,here comes a blue whale.Wow,it’s so big!It’s bigger than my classroom.Oh no!There is a shark!Help!Help!

　　Helen: What’s the matter,mary?

　　Mary: I saw a shark.Its teeth are so big!

　　Helen: Oh,it must be a dream.

　　Mary: Yes,it’s a dream.