One third of the students______ Young Pioneers, and the number of this_____ not change much in our class this term.A.is, doB.are, doesC.was, areD.were, were
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B解析本题主要考查主谓一致，One third of the students主语学生是复数谓语动词用复数形式；后一句the number作主语强调数量谓语动词用单数，故选B。