David's wife is good at _____.she is ____ excellent cook.A.cook;an.B.cooking;a.C.Cook; a.D.Cooking; an.为什么选C不选D?

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David's wife is good at _____.she is ____ excellent cook.A.cook;an.B.cooking;a.C.Cook; a.D.Cooking; an.为什么选C不选D?

David's wife is good at _____.she is ____ excellent cook.A.cook;an.B.cooking;a.C.Cook; a.D.Cooking; an.为什么选C不选D?
David's wife is good at _____.she is ____ excellent cook.A.cook;an.B.cooking;a.C.Cook; a.D.Cooking; an.为什么选C不选D?

David's wife is good at _____.she is ____ excellent cook.A.cook;an.B.cooking;a.C.Cook; a.D.Cooking; an.为什么选C不选D?
答案是D啊,你要相信自己,加油

be good at,at是介词,介词后面+名词或动名词,excellent的e是元音字母,所以用an
是答案说C的吗