单项选择题

A．Doctor and patient.
B．Policeman and car driver.
C．Librarian and student.
D．Post clerk and customer.
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单项选择题
A．It is needed to adjust the temperature of our bodies.B．It is our second need.C．We need it to cover our bodies.D．Weather is changing all the time.
A．It is needed to adjust the temperature of our bodies.
B．It is our second need.
C．We need it to cover our bodies.
D．Weather is changing all the time.
问答题
Today, the majority of mankind suffers from undernourishment, and in view of the population explosion, this situation is likely to grow worse in the coming decades. (Passage 4)
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