—_______ she ________ her room now?

—No, she isn't. She is watching TV.

    Mr. Smith is my new friend. He1from Paris, France. He is a French2of a middle school. His students all like3very much. He can speak some Chinese,4not much. He wants to learn more, so he goes to5 classes every week. He likes living and working6China very much. He7 the Chinese people are very friendly(友好的). He has two8, Maria and Tom. They are students, but they go to different(不同的)9. They have some pen pals and they often write10 the pen pals. They also have many Chinese friends at school and they play games after class.

按时间先后顺序排列正确的是（    ）

①罗马帝国   ②罗马共和国   ③东罗马帝国的灭亡   ④西罗马帝国的灭亡

下列各组数中，能成为直角三角形的三条边长的是（　　）