()farmers use chemicals too much,( )soil pollution is diffcult to stop

问题描述:

()farmers use chemicals too much,( )soil pollution is diffcult to stop

Because ,后面不填啊!老师,求你救救我吧,题目是这样的亲:从句子的结构来看这个句子应该是一个主句和从句的关系。然而又不允许用because...,so...,though......,but...。所以这道题无从考证。有没有前提啊?前提是farmers use chemicals too much ,so soil pollution is difficult to stop (同义句转换)Because,后面就不能用so了。谢谢了