单项选择题

This passage is mainly concerned with_________.

A．people' s growing interest in natural foods
B．natural food and health diet
C．the importance of fibre in foods
D．harmful effects of sugar
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单项选择题
The passage tells us that_________.
A．sugar is bad for the health
B．the use of sugar is habit forming
C．people need sugar to give them energy
D．sugar provides us with nothing useful
单项选择题
The passage tells us that children are the most curious when they are about __________.
A．fours years old
B．six years old
C．one year old
D．two years old
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