（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.