__ most of the earth's surface is covered by water,fresh water is very rare and precious.A.as B.once C.If D.While

分类: 作业答案 • 2022-01-02 15:56:30

问题描述：

__ most of the earth's surface is covered by water,fresh water is very rare and precious.
A.as B.once C.If D.While

答

D.虽然地球表面大部分都是覆盖着水,但是淡水资源还是非常少和珍贵的.While 是虽然的意思.