单项选择题

During the drill, when people hear the bell, they______.

A．should take any route to go down
B．should not go down by stairs
C．should take the lifts
D．should go down by stairs only
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单项选择题
Drinking too much might affect one's______.
A．visual sense
B．sense of balance
C．kinesthetic sense
D．sense of heating
单项选择题
The senses of hearing, smell, touch and taste supply us with______.
A．about 80% of our information about the world
B．about half of our information about the world
C．about 20% of our information about the world
D．all the needed information about the world
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