英语改错急求！十处错误

　原文是这样的：（你好象有的句子漏掉了）
Last Sunday my father and I went fishing along a river. We found the water so dirty that we could hardly catch any fish in it.
　A lot of factories along the river always poured their waste water and rubbish straight into the river which made the river water polluted. In this way most of the fish in the river were killed.
　If the river water all over the country is polluted like this， no living things will exist in the water. As we all know， environmental pollution does great harm to living things . Now more and more people have realized how serious this problem is. Our government is doing her best to take measures to fight against pollution. We expect that the water in every river will be made cleaner and cleaner before long.
第一句：very dirty that 把very 改为 so 这是一个so...that的句型：太..以至于 （水太脏了以至于..）
第二句：most of the fish in the river 后面的was 要改为were，鱼是可数的 复数形式也是fish.这里是复数形式。
第三句：unless 改为If 意为 如果全国各地的河流都像这样被污染，那么水中就没有任何生物了。
这句中的be existe 应该是existe 存在任何生物 要把be 去掉 不是被存在，不要用被动
第四句：environmental pollution后面的do 要改为 does 这是第三人称单数
第五句：what serious this problem is 句子中的what 改为how （意识到）这问题有多么严重

这里有六个错误，你看一下 是不是你没写出来的部分也有错的