单项选择题

He sat______ his head, trying to think of the answer.

A．scrapping
B．screwing
C．scraping
D．scratching
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单项选择题
If one get the meaning of the true sense of happiness, he will______.
A．stop playing games and joking with others
B．make the best use of his time increasing happiness
C．give a free hand to money
D．keep himself with his family
单项选择题
According to the passage, what is the ultimate product of civilization
A．To work to some extent.
B．To be free from hard work.
C．To make wise use of leisure.
D．To keep oneself busy with trifles.
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