作者：英吉
Gasoline marketing is undergoing major changes as stations often not only add convenience stores but also combine with major fast-food chains to build complexes where customers can shop and eat as well as buy gasoline.
(A) not only add convenience stores but also combine with major fast-food chains to build
(B) not only add convenience stores but also they combine with major fast-food chains to build
(C) are not only adding convenience stores but also in combination with major fast-food chains they build
(D) add not only convenience stores, but also combining with major fast-food chains to build
(E) are not only adding convenience stores, but also in combining with major fast-food chains they build
原文大致意思： gasoline market正在经历变化不仅仅加入了一些便利商店而且喝一些快餐连锁结合
题目分析：文章用not only but also写出了一个并列成分，A not only后面加了add convenience storres，but also后面加了combine with ...写的比较对应，留着。
B后面的那个they实在是多余，因为add和combine发起者没有变化，加了1个they就类似于英吉不仅杀人而且他放火了，明显画蛇添足，干掉。
C not only后面用adding，but also后面则用in combination显然不对应，干掉。
D not only后面用convenience stores，but also后面用combining，显然不对应，干掉。
