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单项选择题

According to Richard, what kind of world are we now living in

A．A world with good technology and environment.
B．A severely polluted world.
C．A world filled with bacteria.
D．None of the above.
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单项选择题What is the Sahel mentioned in Paragraph 4

A．The great drought and famine in Africa.
B．The desert along the south edge of the Sahara.
C．The death of thousands of people.
D．Droughts and crop failures.

单项选择题What does Mother Nature is full of surprises these days mean

A．Mothers always give surprises to children.
B．The weather is very changeable these days.
C．People usually feel surprised at the weather.
D．Both mother and nature are surprised at the weather.