请教一道SC.

rabbitbug

62. For decades Surgeon Generals have warned that smoking increases the
risk of lung diseases, including lung cancer and emphysema, and can
complicate pregnancy, and increases the risk of low birth weight.
(a) can complicate pregnancy, and increases the risk of low birth weight
(b) can complicate pregnancy, and increases low birth weight risks
(c) and can complicate pregnancy, increasing the risks of low birth weight
(d) and can complicate pregnancy by increasing the risks of low birth weight
(e) complicating pregnancy by increasing the risks of low birth weight
答案, 这里的risk为什么要用复数呢? 感觉A比D要好, 所以选了A.大家帮忙看看.

cabernet

smoking increases... and
smoking can complicate ....
所以留下c和d
c 不符合语法 :p

rabbitbug

可是A也符合并列结构啊: smoking increases..., can complicate..., and increases..., A 错在哪里了呢?

cabernet

短语之间的并列结构用“，”隔开
分句之间要用and表示并列阿

cabernet

还有一个不同之处，
increases the risk of lung diseases, including lung cancer and emphysema, 和  can complicate pregnancy by increasing the risks of low birth weight 并列

不是
increases the risk of lung diseases, including lung cancer and emphysema
can complicate pregnancy
increases the risk of low birth weight
这三个并列，

因为 increasing the risks of low birth weight 才导致 complicate pregancy
是因果关系，不是并列关系

rabbitbug

158. With only 5 percent of the world's population, United States citizens consume 28 percent of its nonrenewable resources, drive more than one-third of its automobiles, and use 21 times more water per capita than Europeans do.

A With
B As
C Being
D Despite having
E Although accounting for
这是OG的158题, 虽然考点不一样, 可是原句的主句用的就是我有疑问的那个用法: ...consume..., drive..., and use..., 这就是在用动词并列成分, 第二个动词drive前面用的是",". 好像问题不是出在这里吧?

cabernet

：）有道理
其它理由见5楼