补全对话。

A. I prefer to live on a low floor.

B. What a high floor!

C. Where do you live?    

D. How many floors are there in your flat?

E. Which floor do you live on?

F. I also like to live high.

G. It's convenient to climb up the stairs if there is not a lift to take.

George: I heard you moved to a new flat to live in. ____ 

Millie: I live on the twenty-second floor.

George:____

Millie: Yes. I like living high because I can enjoy a good view.

George:____

Millie:____

George: Seven.I live on the third floor.

Millie:____

2010年10月26日上午9时，随着两列国产“和谐号”CRH380A新一代高速动车组从上海虹桥站、杭州站同时疾驶而出，沪杭高速铁路通车运营．这是我国高速铁路引领世界高速铁路发展潮流的又一重要标志．

为了适应火车提速，沪杭线上原有的短轨都需要连接为超长轨．工人常用2Al+Fe₂O₃Al₂O₃+2Fe这一反应原理来焊接钢轨．则反应物中具还原性的物质是 ____

请根据如图完成（1）（2）（3）（4）题