Look! Those _______ my sisters. A.is B.a...

Look! Those _______ my sisters.

A.is B.am C.are D.be

C 【解析】试题分析：be动词往往根据句子的主语而有所不同，其应用原则可以结合如下歌谣来记忆；我用am，你用are；is用在他、她、它。单数名词用is，复数名词全用are。本句主语those为复数形式，故系动词用are，选C。考点：考查主谓一致

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