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        1. The number of the workers here ___ 200. Half of them ____under 30 years old.
          A.a(chǎn)re, areB.is, areC.a(chǎn)re, isD.is, is
          B

          試題分析:句意為:這里工人的數(shù)量是200人,一半在30歲以下。the number of+名詞復數(shù),表示“---的數(shù)量”,謂語動詞應用第三人稱單數(shù)形式。結合語境,“ half of them”指的是一半的工人,表示多數(shù)。根據(jù)主謂一致原則可知應選B。
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