Water _________ about seventy persent of the earth,s surface

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Water _________ about seventy persent of the earth,s surface

Water _________ about seventy persent of the earth,s surface
Water _________ about seventy persent of the earth,s surface

Water _________ about seventy persent of the earth,s surface
填covers
句子需要谓语动词,所以用 cover(覆盖)的三单式.

Water cavered about seventy persent of the earth,s surface.

is covered 被动