根据对话内容，在空白处填写适当的话语（话语可能是一个句子，也可能是一个短语或一个词），使对话完整。

A: Have you read today's newspaper?

B: Yes.  Nothing important, but there is an interesting thing.

A:   1  ?

B: An old man had one million dollars, and he gave it all to charity.

A:   2   he is! What would you do if you had one million dollars?

B: I would give part of it to the Hope Project to   3   the poor children.Because I hope all the children

can   4   every day to get education like me. What about you?

A: That's a good idea.  About me? If I had so much money,  I would put some of it into thebank.  Also

I would   5   some of the money to medical research.  If they have more money, they can study medicine

and treat more illnesses.

闭锁原则是指以某种方法使一些元件强制发生互相作用，以保证安全操作。