单项选择题

Hamburger places usually play fast background music because______.

A．they think that will make the attendants work faster
B．they believe fast music can make people eat more
C．time spent on eating is less than before and more customers will be coming in and out to buy hamburgers
D．hamburgers will become more popular
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单项选择题
What is the major point that the author is making in the article
A．The Constitution, one of the great documents of the world, was written by fifty- five men of varying talents and backgrounds.
B．The Constitution owes its greatness to the fact that it has never changed in a changing world.
C．The Constitution was written by many people working together cooperatively.
D．The Constitution was written by many people, all of whom were thinkers of the highest order.
单项选择题
In the passage the author mainly intends to______.
A．teach people a moral lesson
B．show people the way to success in business
C．advertise a special product
D．describe the side-effects of the chemotherapy for cancer
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