In colonial America，most people warmed their homes by building a fire in a fireplace even though it was dangerous and used a lot of wood.Ben figured that there had to be a better way.His invention of an iron furnace stove allowed people to warm their homes less the dangerously and with less wood.The furnace stove that he invented is called the Franklin Stove.Interestingly enough，Ben also established the first fire company and the first fire insurance company in order to help people live more safely.

　　As a postmaster，Ben had to figure out routes for delivering the mail.He went out riding in his carriage to measure the routes and needed a way to keep track of the distance.He invented a simple odometer(里程表)and attached it to his carriage.

　　Later，other famous inventors，like Thomas Edison and Alexander Graham Bell，followed in Ben's footsteps by trying to find ways to help people live better.

　　【解题导语】 本杰明·富兰克林(Benjamin Franklin)是美国历史上第一位享有国际声誉的科学家、发明家。

　　48．How many things invented by Benjamin Franklin are mentioned in the passage?

　　A．3

　　B．4

　　C．5

　　D．6

　　答案　B　[细节理解题。这篇文章提到了富兰克林发明的四种东西：双光眼镜、避雷针、富兰克林炉和里程表。]

　　49．What do we know about the Franklin Stove?

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