新概念英语（1-19）Tired and thirsty 
Why do the children thank their mother?

A:What's the matter, children?

B:We are tired... and thirsty, Mum.

A:Sit down here.

B:Are you all right now?

A:No, we aren't.

B:Look!There is an ice cream man.

A:Two ice cream please.

A:Here you are, children.

B:Thanks Mum.

B:These ice creams are nice.

A:Are you all right now?

B:Yes, we are thank you!