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More than 70 percent of the surface of the earth water.A.is made up ofB.is covered byC.are covered b

编辑:chaxungu时间:2026-04-24 13:01:30分类:高中英语题库

More than 70 percent of the surface of the earth ________ water.
A.is made up ofB.is covered byC.are covered byD.are made up of在线课程B