12.A) Mary has a keen eye for style.

　　B) Nancy regrets buying the dress.

　　C) Nancy and Mary went shopping together in Rome.

　　D) Nancy and Mary like to follow the fashion.

　　M：How does Nancy like the new dress she bought in Rome?

　　W：She said she would never have bought an Italian style dress if she had known Mary had already got such a dress.

　　Q：What do we learn from the conversation?

　　B)。四個選項中多次提到Nancy和Mary，還出現了style, dress, fashion等詞，所以推測本題可能涉及兩人的某件服裝款式。對話中男士打聽Nancy是否喜歡新買的衣服，女士回答到，Nancy說如果她知道Mary已經有一件這樣款式的衣服，她絕對不會買的。結合生活實際，任何人都想買一件與眾不同的衣服，可見Nancy后悔自己買了一件與別人同樣款式的衣服。故答案為B)。