单项选择题

The passage is about ______.

A．the importance of education
B．the importance of play
C．the children' s speech development
D．the relationship between play and study
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单项选择题
Food that is rich In organic matter ______.
A．has been nourished by' fertilizers
B．contains vegetable matter that has not been consumed
C．has had chemicals and fertilizer added to it
D．contains large quantities of vitamins
单项选择题
Toys have several functions except ______.
A．helping children to play
B．urging children to play
C．recommending ways for children to play
D．asking children to play
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