British tourists going abroad are often advised to drink only boiled or bottled

British tourists going abroad are often advised to drink only boiled or bottled water. The few occasions when I have ignored this have been followed by expensive visits to the doctor's .

Now it seems visitors to Britain may soon be given a similar warning. At present, we take for granted our endless supply of fresh, clean tap-water, but this may alter unless farmers can be persuaded to change the fertilizers they use.

These fertilizers contain nitrates , which also occur naturally and are essential to life, but are poisonous in excess . It is the farmers who are responsible for the dangerous increase in the amount of nitrates absorbed into our water supply.

As it is very different and expensive to remove nitrates from our drinking water, the authorities believe that the nitrates should be prevented from getting into our water in the first place. This, they say, is the farmers' responsibility. While changing farming methods may well reduce the amount of crops we grow, the expense of importing food will probably be less than that of purifying the water.

(1) What warning may visitors to Britain soon be given?

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A．Please drink boiled or bottled water only .

B．Please don't drink water.

C．Please drink our fresh, clean tap-water.

D．Please follow the doctor's advice .

(2) What does the writer mean by“we take for granted”?

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A．We are not worried about it .

B．We are trying to use it.

C．We think it is natural and safe to drink tap-water.

D．We don't think it is safe to use tap-water.

(3) When are nitrates dangerous?

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A．When there are too many nitrates in water.

B．When there are a few in water.

C．When people drink the nitrates absorbed into the water supply .

D．When people drink the water which contains too many nitrates.

(4) What do the authorities claim is the farmers' responsibility?

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A．Farmers are using the fertilizers which contain nitrates .

B．It is difficult and expensive to remove nitrates from our drinking water.

C．Nitrates should be prevented from getting into the drinking water.

D．Farmers should change their way of farming by stopping using nitrate-containing fertilizers .

(5) Why may farmers reluctant to stop using nitrate-containing fertilizers?

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A．Because they don't want to import food .

B．Because they can't make enough money .

C．Because they may reduce their agricultural production .

D．Because they may not increase the amount of the nitrates in the water.

试题答案

答案：A;C;D;D;C