We know that about seventy percent _____ the earth _____ covered by water.A．/; i
题型：不详难度：来源：
We know that about seventy percent _____ the earth _____ covered by water.| A．/; is | B．of; are | | C．of; is | D．about; are |
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答案
| C |
解析
试题分析：句意：我们都知道70%的土地都被水覆盖。百分数+名词做主语，谓语动词的选择要根据这个名词而定。本题中earth是不可数名词，因此谓语动词要用单数。故选C。 |
举一反三
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