B是对的
因为主语是Carol ,三单,谓语动词play 加S.另外,WITH 后没有直接跟动词呀
主语后接有with ,along with ,together with ,as well as ,no less than ,more than ,including ,besides ,like ,except ,but 等词或短语时,谓语动词的数由主语的单,复数形式决定,即“就远原则” 如 No one but I is mistaken .
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