and 前后有2个不同主语的话，不一定要用逗号隔开，不隔开的我一时没找到，但是这种平行结构是没有问题的：SVO and SVO，你说的“经常碰到的一种错误类型不就是and it...前没有逗号吗？”应该是指的同一个主语的情况，这种情况下用SVO and VO更简洁 用逗号隔开的： 116. Those who come to church with a predisposition to religious belief will be happy in an auditorium or even a storefront, and there is no doubt that religion is sometimes better served by adapted spaces of this kind instead of by some of the buildings actually designed for it.
(A) adapted spaces of this kind instead of by some of the buildings actually designed for it (B) adapted spaces like these rather than some of the buildings actually designed for them (C) these adapted spaces instead of by some of the buildings actually designed for it (D) such adapted spaces rather than by some of the buildings actually designed for them (E) such adapted spaces than by some of the buildings actually designed for it Choice E, the best answer, correctly uses the construction is better served by x than by y and supplies the proper singular pronoun, it, to refer to religion. Choices A and B complete the construction beginning better served by x... unidiomatically, with instead of by y and rather than y. Also in B, them does not agree with its logical referent, religion. Choice C repeats the unidiomatic instead construction; in addition, such is preferable to these for presenting examples or instances. Choice D repeats the errors with rather than and them. | 
