In winter,most of the rivers and lakes there are__.It become

In winter,most of the rivers and lakes there are__.It become some of the rivers and lakes have (become) polluted 能不能用been Most of the water we use c____ from rivers,lakes and the atm And in places where there are rivers and lakes In places where there are rivers and lakes,students usually Water ______ in seas, rivers and lakes. In places where there are rivers and lakes.中,there可不可以省略? In places where there are rivers and lakes,where there are r And in places where there are rivers and lakes.是什么从句?为什么要用wh And in piaces where there are rivers and lakes,like hongshan In places where there are rivers and lakes,like Hongshanhu a The water in the lakes and rivers in Yunnan be-came______bec