单项选择题

From the situation described in the first paragraph, we know that ______.

A．drivers should learn how to repair their own cars
B．driving alone on the highway can be very dangerous
C．one has to be very careful in handling a car emergency
D．this passage is intended for drivers facing an emergency
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单项选择题
When you find the engine is hotter than normal, you should ______.
A．drive to a service station to get a cool engine
B．turn off your heater so as to cool down the engine
C．switch on the heater as soon as possible
D．try to make the engine boil over ______.
单项选择题
According to the passage, the development of industry and agriculture seems ______.
A．only a burden to the human society
B．the result of the rapid growth of population
C．more harmful than beneficial
D．not likely to slow down
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