快要考了,有一道PREP不知道

91.   (29477-!-item-!-188;#058&003926)

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.

(A) many audiophiles and audio professionals prefer the warmer, richer tones produced by vacuum-tube-driven amplifiers

(B) many audiophiles and audio professionals think the warmer, richer tones produced by vacuum-tube-driven amplifiers make them preferable

(C) warmer, richer tones are produced by vacuum-tube-driven amplifiers and they are thus preferred by many audiophiles and audio professionals

(D) vacuum-tube-driven amplifiers are preferred because they produce warmer, richer tones by many audiophiles and audio professionals

(E) vacuum-tube-driven amplifiers are preferred by many audiophiles and audio professionals because these amplifiers produce warmer, richer tones

答案选E,看不懂题,我选A.请NN说说这个题的分析思路吧

they = vacuum-tube-driven amplifiers，主语前后保持一致，排除ABC。

被动语态are preferred by sb. 然后加because 从句。Perfect。

选E咯