我来说说我的观点吧。
对于B的最明显的错误是，BY语法说，:~ing分词的完成时态不能作名词的定语,必须转化为定语从句.所以通过....gases having been implicated排除B。PREP解释里也是这样说的.
仔细研究之后，as well as两种用法: 1. Y发生在X之前，是一个backgroud的内容
2. Y是从属关系，X才是句子强调的重心（这个同样适用于阅读）
3. 那加上这个题,as well as有了第三种用法(我觉得也算是从属于第二种用法,因为也有补充的意思),就是PREP解释里说的, 本句使用了这样一种基本句型：A did one thing, as well as doing another thing. 这种句型属于as well as 的一种使用方法，朗文给出的例句为：The organization gives help and support to people in need, as well as raising money for local charities.
如果按照MM的意思，as well as做连词要平行，所以选B.
我没发现有do…, as well as do这样的用法.假如的确没有的话，那就是如LONGMAN所说，as well as doing something 位于逗号后，对主句的谓语动作做出补充，为正确的习语结构.所以do…., as well as do是不符合习语的,是错误的,这样也可以排除B.
以下是我从大全里搜索到的和这个习惯搭配有关的几个例子,相信都没有这个题有难度. 例句: 1. All-terrain vehicles have allowed vacationers to reach many previously inaccessible areas, but they have also been blamed for causing hundreds of deaths, injury to thousands, and seriously damaging the nation’s recreational areas. (A) deaths, injury to thousands, and seriously damaging (B) deaths and injuring thousands, and serious damage to (C) deaths, thousands who are injured, as well as seriously damaging (D) deaths and thousands of injuries, as well as doing serious damage to
(E) deaths, thousands are injured, and they do serious damage to 平行角度只有选D, hundreds of deaths and thousands of injuries do damage to sth./damage sth.
2. Eating saltwater fish may significantly reduce the risk of heart attacks and also aid for sufferers of rheumatoid arthritis and asthma, according to three research studies published in the New England Journal of Medicine. (A) significantly reduce the risk of heart attacks and also aid for (B) be significant in reducing the risk of heart attacks and aid for (C) significantly reduce the risk of heart attacks and aid
(D) cause a significant reduction in the risk of heart attacks and aid to (E) significantly reduce the risk of heart attacks as well as aiding Choices A, B, and D each produce a clearly unintended meaning: by using aid as a noun rather than a verb, each creates a misleading parallel with the noun risk so that the sentences nonsensically state that eating saltwater fish may reduce aid as well as risk. In addition, B and D are wordy and awkward. Choice C, the best answer, avoids the prepositions for (from A and B) and to (from D), instead using aid as a verb that is parallel with reduce. Choice E lacks the grammatical parallelism of may reduce... and aid, the compound verb in C
3. If industrial pollution continues to deplete the ozone layer, the resulting increase in ultraviolet radiation will endanger human health, causing a rise in the incidence of skin cancer and eye disease, and perhaps even threatening global ecological systems. (A) and perhaps even threatening (B) and may even threaten
(C) and even a possible threat to (D) as well as possibly threatening (E) as well as a possible threat to A) 根据句意threaten global ecological systems应与endanger human health并列平行。
B) best. C) threat应该用动词。
D) 同A. E) 同C.
4. The winds that howl across the Great Plains
not only blow away valuable topsoil, thereby reducing the potential crop yield of a tract of land, and also damage or destroy young plants. (A) and also damage or destroy (B) as well as damaging or destroying (C) but they also cause damage or destroy (D) but also damage or destroy
(E) but also causing damage or destroying Choice D, the best answer, correctly employs the correlative construction not only x but also y, where x and y are grammatically parallel and where both x and y (damage and destroy) apply to young plants. Choices A, (not only... and also), B (not only... as well as), and C (not only... but they also) violate the not only... but also paradigm. Moreover, B contains terms (blow... damaging) that are not parallel. In C and E, damage is used not as a verb with young plants as its direct object but as a noun receiving the action of cause; consequently, these choices fail to state explicitly that the damage is done to young plants. E also violates parallelism (not only blow... but also causing)
不知道这样一来，MM是否还会坚持考试选B? | 
