题目

Ninety-six point five percent of the water on the earth ______ sea water. A. are              B. is                  C. was             D. were 答案：B 解析: 考查主谓语一致性。百分数和分数做主语要依据它们后面接的词而定，是名词复数形式的用复数谓语动词；反之用单数谓语动词。此处water为不可数名词，为一般事实，故选B符合。

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