og139 介词补出问题疑惑！

ford424

139. The extraordinary diary of William Lyon Mackenzie King, prime minister of Canada for over twenty years, revealed that this most bland and circumspect of men was a mystic guided in both public and private life by omens, messages received at séances, and signs from heaven.

(A) that this most bland and circumspect of men was a mystic guided in both public and

(B) that this most bland and circumspect of men was a mystic and also guided both in public as well as

(C) this most bland and circumspect of men was a mystic and that he was guided in both public and

(D) this most bland and circumspect of men was a mystic and that he was guided in both public as well as

(E) this most bland and circumspect of men to have been a mystic and that he guided himself both in public as well as

答案是a，但有一点不明白，请教大家。

a中后面为什么不不补出in，成为and in private life,那样不是更对称，关于介词的补出问题，究竟什么时候需要补出呢？

谢谢大家！！！

colacat

因为in在both前面，both...and...是形容词并列，

如果是both in public life and in private life 这样，介词就不能省略了。但是这样非常不简洁。

ford424

thanks