从方框中选择正确的单词，将其适当形式填在空白处，使对话完整、正确。

die,   what,   scientist,   change,   something

A: Have you learned Topic 2, Unit4?  

B: No, not yet. We will begin to learn it next week.

A: But we've learned it. It's about some  like Edison, a great American inventor.

B: I have read about Edison in a book, so I know  about him.

A: Really?

B: Yes. He invented a lot of things. And they all have  the world.

A: I know he was born in 1847, and died in 1931.

B: So he has been  for more than eighty years.

A: Yes, but we can remember him every day.

B: Sorry, I don't understand  you mean.

A: Do you give your friend a call every day?

B: Yes. Oh, I see. Edison invented the telephone.