有人这样评价当今世界：“巨人林立，美国是萎缩的巨人，日本是独脚巨人，俄罗斯是生病的巨人，欧洲是缺乏凝聚力的巨人，中国是潜在的巨人。”如果这一评论具有一定的针对性和概括性，说明当今世界的政治格局的基本特点是（    ）

读一读， 选择句子补全对话。

A. They have breakfast at seven o'clock.    
B. What time do you get up?
C. I have breakfast at half past seven.    
D. I go to school at a quarter to eight.

Lisa: Hello, Pat.

Pat: Hi, Lisa. ____ 

Lisa: I get up at a quarter past seven. Then I brush my teeth and wash my face.

Pat: What time do you have breakfast?

Lisa: ____

Pat: Do your parents have breakfast at half pastseven too?

Lisa: No, they don't. ____

Pat: What time do you go to school?

Lisa: ____

牙齿对动物的生存和生活具有重要意义，如图是某动物上、下颌骨及牙齿的示意图，请据图回答下列与牙齿有关的问题．