单项选择题

What is the best title for the passage

A．Three Kinds of Loneliness.
B．Loneliness and Diseases.
C．Loneliness and Social Contacts.
D．Chronic Loneliness.
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单项选择题
The author implies that this world plan is to ______.
A．be carried in ten years.
B．be realized in ten years
C．be drawn up by Parisian experts
D．be debated at an international conference
单项选择题
Studying carefully the clues in the passage, we learn that the total population of Africa is ______.
A．approximately seven hundred million
B．approximately one hundred and twenty-five million
C．approximately eight or eight point five thousand million
D．exactly twenty-four million
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