（四）
The Huaihe River has been serious polluted. Day and night 76.
millions of tons of waste water is being poured down to it from 77.
hundreds of factories. The waste water is harmful. At present 78.
there is no fish in it. The river water cannot be drunk. People in 79.
either bank have to dig wells to take drinking water. The Huaihe 80.
River is such dirty and poisonous that people don't dare swim 81.
in it. Something must be done to stopping the pollution. The 82.
government and the people near the river must try to clear water 83.
as soon as possible. Now special attention has paid to the 84.
pollution by the government and more scientists. The pollution 85.
will be prevented in the near future.76. serious→seriously 77. to→into 78. √ 79. in→on
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(答案→)76. serious→seriously 77. to→into 78. √ 79. in→on
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