选用适当的介词填空。

1. What do you do ___ Sunday? 　　

2. I get up ___ 6:10 in the morning. 　　

3. I sit far ___ Li Ming. His seat is not near mine. 　　

4. Mr. Black lives ___ my house. You can see his house from my window. 　　

5. Do you do your homework ___ the evening? 　　

6. Bob is talking ___ his daughter. 　　

7. He is leaving ___ Changchun.

型钢生产中产生辊身断裂事故的原因有（）。

A、轧件温度低

B、压下量过大

C、热应力造成

D、错误喂钢