（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.