Land animals are believed from sea animals.A. to developB. developingC. developed D. to have developed 题目和参考答案——青夏教育精英家教网—

题目内容

Land animals are believed ______ from sea animals.

A. to developB. developing

C. developed D. to have developed

【解析】

试题分析：考查固定句型；句意：陆栖动物被认为是从海洋生物发展而来。Be believed to have done 被认为已经做了某事，故选D项。

考点 : 考查固定句型

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