从方框内选样合适的句子补全对话，并把序号写在横线上。

Chen Jie and her mum are chatting on the photo video. (手机视频)

Mum: How are you, honey（宝贝）?

Chen Jie: The summer camp is wonderful!

Mum: Where are your tents (帐篷)?

Chen Jie:

Mum: Cool. What does it say?

Chen Jie: It says: No Swimming. No Fishing.

Mum: You must obey the rules （遵守规定）. What are your friends doing now?

Chen Jie: Look! Andy is sleeping on the grass.

Mum: Everyone is having a good time.

Chen Jie: Yes. We are having a picnic on the grass, too.

Mum: Good. But please keep the grass clean.

Chen Jie: OK. Thank you, mum.

A. Tom is drawing a picture. B. Don't leave trash（垃圾）on the grass. C. Oh, I see a sign（标牌）beside the lake. D. Look, they are near the lake. E. I'm great!