Most fishes and many reptiles have ribs along most of the spine, but in mammals ______ only in the chest area.

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问题 Most fishes and many reptiles have ribs along most of the spine, but in mammals ______ only in the chest area.

选项 A、they are found
B、finding them
C、are found
D、in which they are found

答案A

解析本题考查句子结构。but连接两个表示转折的并列句子，in mammals和only in the chest area均作状语，故but后的句子缺少主语和谓语，故答案为[A]项。

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翻译硕士（翻译硕士英语）

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