According to the passage, the one factor that is not responsible for the presence of insecticides in ponds is .

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• 1The author's tone in this passage can be best described as .

  A.reportorial

  B.sarcastic

  C.condemnatory

  D.mournful

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• 2The author's attitude towards road politeness seems to be .

  A.suspicious

  B.indifferent

  C.ironical

  D.objective

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• 3According to the experts, facing the car-ownership explosion, we should .

  A.be more considerate yield to each other

  B.communicate with each other more often

  C.have a cool head and good temper

  D.avoid misplaced politeness

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• 4Which of the following does NOT illustrate misplaced politeness、

  A.Encouraging old ladies to cross the road at any time they want.

  B.Braking suddenly to allow a car to emerge from a side street.

  C.A motorist driving into traffic streams without considering others.

  D.Waving a child across a zebra crossing into the path of oncoming vehicles.

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• 5The author argues that road politeness .

  A.can better the traffic unconditionally

  B.calls for a driver's cool-headed and good-tempered personality

  C.can be found after the modern traffic conditions stand up

  D.are acknowledged by most drivers

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• 6The author uses the case of the Rhodesian fish in order to .

  A.show the harmful effects of killing fish

  B.prove that problems are the same everywhere

  C.show that fish is an indispensable source in diet

  D.consider the problem of controlling mosquitoes

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• 7In this passage, what the author does not do is .

  A.state a problem

  B.give examples

  C.propose a solution

  D.relate causes

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• 8The last sentence of this passage means that .

  A.you can not control mosquitoes if you want to conserve an important fish

  B.you can not conserve an important fish if you want to control mosquitoes

  C.the Central Africans will have no fish to eat if this fish can't be protected properly

  D.it is not so easy and satisfactory to solve these two problems at the same time

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• 9The phrase "joint venture" mentioned in the first paragraph refers to .

  A.any joint relationship between one foreign firm and one local firm

  B.any joint relationship between foreign firms

  C.joint ownership of an operation in which at least one of the partners is foreign based

  D.all of the above

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• 10The word "qualms" in the second paragraph may have the equal meaning with .

  A.abilities

  B.worries

  C.possibilities

  D.limits

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