单项选择题

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A. They are discussing business courses.
B. They are discussing American Literature.
C. They are discussing colleges.
D. They are discussing selecting courses.
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单项选择题
A. Cold and wet are not responsible for catching colds. B. No one caught a cold even they were kept cold and wet. C. A cold virus caused a cold in volunteers. D. h was easier to catch a cold indoors in winter.
A. Cold and wet are not responsible for catching colds.
B. No one caught a cold even they were kept cold and wet.
C. A cold virus caused a cold in volunteers.
D. h was easier to catch a cold indoors in winter.
单项选择题
A. Keep it elevated. B. Put a bandage on it. C. Clean it. D. Ignore it.
A. Keep it elevated.
B. Put a bandage on it.
C. Clean it.
D. Ignore it.
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