材料二：在孔子的心中，知耻是第一位的。《论语》中有这样一段话：子贡问孔子怎样才能成为一个真正的“士”，孔子说：“行已有耻”是最重要的。

在桌子上放上两摞书，把一块洁净的玻璃垫起来，使玻璃离开桌面2～4厘米。在宽0.5厘米的纸条上画出各种舞姿的人形，用剪刀剪下这些人形，放在玻璃板下面。然后用一块硬泡沫在玻璃板上迅速来回摩擦，你会看到什么现象?小纸人翩翩起舞了吗?如图所示。请解释产生这种现象的原因。如果你把小纸人放在玻璃板上面，让其他同学帮一下忙，用泡沫在玻璃板底下摩擦，小纸人也翩翩起舞吗?请解释所发生的现象。

阅读短文，从A、B、C、D四个选项中选择最佳答案。

    Mr. White and his 1 wanted to do it by decided to paint the outside of their house. To save money they 2. On Saturday morning they bought some paint and two brushes. They began that afternoon 3 the back of the house. The next Saturday 4 went to a football match while his wife painted the 5 of the house. On Sunday they found they couldn't open 6 of the front windows. They got them all 7 in the end. But they 8 three of the seven which were very expensive to repair. Next time 9 10 try to save money, they'll certainly pay to do the work.