单项选择题

People probably take part in dangerous sports nowadays because______.

A．they have a lot of time
B．they can go to hospital if they are injured
C．their lives are short of excitement
D．they no longer need to hunt for food
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单项选择题
What is the tuition for a full-time student
A．One thousand eighty dollars.
B．Two thousands eighty dollars.
C．One thousand sixty dollars.
D．Two thousand sixty dollars.
单项选择题
The U.N. estimates the food crisis in the Horn of Africa is affecting
A．12 million people
B．12 billion people
C．20 million people
D．20 billion people
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