（四）The Huaihe River has been serious polluted. Day and night　　　 76.millions of tons of was

（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

(答案→)76. serious→seriously 77. to→into 78. √ 79. in→on 解析：可联系答.案.网客服索取。

我明天再问问老师，叫他解释下这个问题