单项选择题

Which of the following regions in the world will witness the sharpest drop in life expectancy

A．Latin America.
B．Sub-Saharan Africa.
C．Asia.
D．The Caribbean.
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单项选择题
The speaker think the causes of automobile accidents are________.
A．obvious.
B．very complicated
C．familiar
D．not well understood
单项选择题
What did Steve originally plan to do
A．To go to a park near the beach.
B．To stay at home.
C．To see a new film.
D．To do some study.
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