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题库 / Prep2007E1-SC-64
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.
the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
针对D，我不认为错误的原因在于when placed的逻辑主语错误。
when placed in a stimulating environment是状语从句的省略，变化为过去分词的形式，因此'placed in a stimulating environment'过去分词就近修饰名词mice
D最大的问题在于they的指代不清晰，有歧义地指代了neuron
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