单项选择题

A．Food processing.
B．Environmental protection.
C．Shopping habits.
D．Overpackaging problems.
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单项选择题
A．Sleep and dreams.B．Moods of people.C．Effect of dreams.D．How to manipulate sleep.
A．Sleep and dreams.
B．Moods of people.
C．Effect of dreams.
D．How to manipulate sleep.
单项选择题
A．Crying is a natural thing for children, but not for adults.B．Crying is considered unfortunate for adults.C．Adults have learnt to control their emotions.D．Adults have forgotten how to cry.
A．Crying is a natural thing for children, but not for adults.
B．Crying is considered unfortunate for adults.
C．Adults have learnt to control their emotions.
D．Adults have forgotten how to cry.
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