单项选择题

Why is heart disease the most dangerous killer in the United States

A．Because American people drink too much spirits.
B．Because there are a great number of fat people there.
C．The author doesn't give a definite answer.
D．Because American people eat too much fatty fish.
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单项选择题
The first paragraph points out that ______.
A．it is possible to get an exact figure of the world' s disabled people
B．there are many disabled people in the world
C．the number of disabled people in India is the greatest
D．India has not much more disabled people than Canada
单项选择题
It can be concluded from the passage that ______.
A．we should try our best to prevent disablement
B．we must take a proper attitude towards the disabled
C．the able-bodied people will never fully understand the disabled
D．both physical and mental barriers are hard to break down.
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