With only a few variations

　　this is how cement is made today.

　　11. What is the main topic of the talk?

　　12. Who developed the kind of cement that is used today?

　　13. What was significant about the new kind of cement?

　　Passage Two

　　In America, where labor costs are so high

　　do-it-your-self is a way of life.

　　Many people repair their own cars

　　build their own garages, even remodel their own houses.

　　Soon they many also be writing their own books.

　　In Hollywood there is a company that publishes childrens books with the aid of computers.

　　Although other book companies also publish that way

　　this particular company is very unusual.

　　It personalizes the books by having the computer make the reader the leading character in the story.

　　Here is how they do it.

　　Let us say your child is named Jenny.

　　She lives on Oak Drive in St.Louie

　　has a dog named Spot, a cat named Tabby

　　and three playmates whose are Betsy,Sandy and Jodo.

　　The computer uses this information to fill out a story that has already been prepared and illustrate

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