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.
                    
                
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                Anot only add convenience stores but also combine with major fast-food chains to build
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                Bnot only add convenience stores but also they combine with major fast-food chains to build
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                Care not only adding convenience stores but also in combination with major fast-food chains they build
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                Dadd not only convenience stores, but also combining with major fast-food chains to build
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                Eare not only adding convenience stores, but also in combining with major fast-food chains they build
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        正确答案: A