题目:
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.
选项:
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
答案:
A