【題目】The library keeper is worried, because the number of readers ________ smaller and smaller.

A.is becomingB.are becomingC.becameD.will become

【答案】A

【解析】

句意:圖書管理員很焦慮,因為讀者的數(shù)量正變得越來越少。

根據(jù)句意指讀者的數(shù)量正變得越來越少,所以要用現(xiàn)在進(jìn)行時;又因為the number of作主語,謂語動詞用單數(shù)形式,故選A。

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