以“那些不朽的书籍”为陈述对象，重组下面的句子。

    我们从那些经历了历史的变迁和朝代的兴亡，虽遭时光冲刷，但内容仍然新鲜有用的不朽书籍中，接受前人的知识积累和学术成果。

那些不朽的书籍                                                                        

中国古代的四大发明传入欧洲，加快了西方迈入近代社会的步伐 。“使推广民众教育成为可能”的发明是(　　)

根据短文内容，选择正确答案。

    David did well in all his subjects except physics, Mr. Brown, his physics teacher, gave him his physics paper and said to him, “Show it to your dad and ask him to sign his name on the paper.”

    David played football until it was 7 o'clock. When he got home, his parents had finished supper. His dad was watching TV and his mother was doing the dishes in the kitchen as usual.

 “Dad, may I ask you some questions?” David asked happily.

 “Yes, of course,” answered his dad.

 “If you can't answer them, you'll have to do something for me.”

 “OK, I'll do as you tell me,” said his dad.

 “Which is cooler, walking or sitting in the sun?”

 “Walking is cooler. It can make wind.”

 “Which clothes can keep out (阻挡）the sunlight，shirts or coats?”

 “Coats can keep out the sunlight because they are much thicker than shirts.” “Is a man smart if he wears a coat and walks in the sun in summer?” David looked at his dad and waited for his answer. His dad thought for a minute and shook his head.

   David took out his paper, “Now sign your name on the paper, please.”