补全对话
A: It's a nice day.
B: Yes, it's a beautiful day .
A: Are there so many people here all the time?
B: __________. This is my first time here.
A: Me, too. I think this is a great place.
B: Yeah, I think so too.
A: _________?
B: I’m visiting from London. How about you?
A: _______.
B: That’s cool. Are you having a good time?
A: Yes. There are many things to see and I’m taking a lot of picture.
B: ______?
A: For two weeks, I went to San Francisco and Los Angeles. I want to see Yellow Stone National Park before I leave.
B: ________.
A: Oh, my friends are waiting for me. I hope you enjoy your stay here.
B: Thank you. It was nice meeting you.