Unit3语法填空人教版高中英语必修三(含答案)
1.Every year,about 1.6 million tons of soil flows into the Yellow River,China’s second 1. (long) river.The soil contains materials 2. (keep) the natural balance of the area.Over time,a lot of soil 3. (remove),which has caused serious erosion of the land along the river.In some areas in Shanxi Province,this has destroyed almost all the land,and has forced many local farmers 4. (move) to other areas.