单项选择题

A．The book is an attack on the use of chemical preservations in food.
B．The book is a discussion of the hazards insects bring to the food supply.
C．The book is a warning about the dangers of misusing insecticides.
D．The book is an illustration of the benefits of the chemical industry.
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单项选择题
A．Because he hated the beggar.B．Because the horse recognized the prince as its owner.C．Because he thought the prince was rich and therefore should own a horse.D．No reason at all.
A．Because he hated the beggar.
B．Because the horse recognized the prince as its owner.
C．Because he thought the prince was rich and therefore should own a horse.
D．No reason at all.
单项选择题
A．In warm air.B．In cold air.C．When it reaches the polar region.D．Only when the clouds are down low.
A．In warm air.
B．In cold air.
C．When it reaches the polar region.
D．Only when the clouds are down low.
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