下列动物中用气囊辅助呼吸的是（　　）

A. go to see him         

B. have a lot of fun

C. under the tree                    

D. at Christmas

E. a Christmas tree                

F. buy presents

G. a turkey and Christmas puddings

A:What do you do ____?

B: First, we ____ for our family and friends. We need to buy____.We put our presents ____.It looks great.

A:What do you like best at Christmas?

B:I like Father Christmas. We sometimes ____.

A:What do you eat that day?

B:I eat ____ .

A:So you ____at Christmas.

甲、乙两图分别是“某市城市化过程及该市距市中心地租水平变化图”。读图回答下列各题。