单项选择题

A．Studying for a test.
B．Visiting a close fiend of theirs.
C．A class presentation they’re preparing.
D．A television program the man is watching.
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单项选择题
A．Diet.B．Weight control.C．Aerobic exercise.D．Eating habits and exercise.
A．Diet.
B．Weight control.
C．Aerobic exercise.
D．Eating habits and exercise.
单项选择题
A．A comparison between the poorest countries and richest countries.B．An aid for health care to developing countries.C．The relationship between health care and economic growth.D．The investment in developing countries.
A．A comparison between the poorest countries and richest countries.
B．An aid for health care to developing countries.
C．The relationship between health care and economic growth.
D．The investment in developing countries.
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