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题库 / Prep2007E1-SC-91
Although they are more temperamental and far more expensive than transistor-driven amplifiers, many audiophiles and audio professionals prefer the warmer, richer tones produced by vacuum-tube-driven amplifiers.
many audiophiles and audio professionals prefer the warmer, richer tones produced by vacuum-tube-driven amplifiers
many audiophiles and audio professionals think the warmer, richer tones produced by vacuum-tube-driven amplifiers make them preferable
warmer, richer tones are produced by vacuum-tube-driven amplifiers and they are thus preferred by many audiophiles and audio professionals
vacuum-tube-driven amplifiers are preferred because they produce warmer, richer tones by many audiophiles and audio professionals
vacuum-tube-driven amplifiers are preferred by many audiophiles and audio professionals because these amplifiers produce warmer, richer tones
although让步状语从句放在句首，不要求主句的主语一定要和从句的主语保持一致。
选项A：主句的主干是many audiophiles and audio professionals prefer the warmer, richer tones. 这样从句中they所指代的vacuum-tube-driven amplifiers变成了tones的定语。无法形成让步转折关系
选项B，C错误分析同选项A。从句描述了一个vacuum-tube-driven amplifiers不好的地方（反复无常且太贵），逻辑上转折以后需要要描述优点
选项D：preferred距离by audiophiles and professionals太远
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