最佳答案：1.The level of pollution in the river was falling.2.It says a lot for him that he has rais
1.The level of pollution in the river was falling.
2.It says a lot for him that he has raised his game to the level required
3.What is the level of this course?
4.It was concluded that the level of change necessary would be low.
5.Many families are living below the level of subsistence.
