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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

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单项选择题Which of the following is NOT mentioned in the passage

A．Chickens are fed on food which is little better than garbage.
B．Chickens live in very crowded condition.
C．The eggs chickens produce lack vitamins.
D．Chickens are free to move about.

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