单项选择题

What's the main topic of the passage

A．Poor nutrition in developing countries.
B．World Bank research.
C．Economic growth rate.
D．Ways to fight malnutrition in developed countries.
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单项选择题
Which of the following is a cause leading to Hawking's divorce
A．He fell in love with one of his nurses.
B．His illness became worse.
C．He does not believe in God.
D．His temper is bad.
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