That is why mothers who want to keep abreast of trends usually 18 the experts－their daughters.
答案：(C) turn to
【句型】turn to 固定片語「求助於/向……請教」；deal with（處理）、head for（前往）、look into（調查）都不合。
turn to 在你腦中的第一個意思大概是「轉向」或「翻到第幾頁」，很少想到它可以是「向某人求助、請教某人」。答對率只有 40%，是這一年最低的一題。最多人挑的是 deal with 或 head for——「處理專家」「前往專家」中文一唸就知道怪，但在時間壓力下，看到後面接的是人，很容易憑感覺亂配。
先看空格後面的受詞是誰：the experts－their daughters。破折號在這裡是同位語，把「專家」等於「她們的女兒」。所以整句是「想跟上潮流的媽媽通常會 ______ 她們的女兒」。前一句已經把理由講完了：There isn’t a brand or a trend that these young people are not aware of.（沒有哪個品牌或潮流是這些年輕人不知道的）。既然女兒什麼都懂，媽媽會做的事就是去請教她們。turn to somebody 的意思正是「求助於某人、向某人請教」（劍橋詞典），核心意象是遇到問題時「轉過身去找那個人」，後面接的是人，正好對上。
deal with：處理、應付，受詞是問題或事情；把女兒當成要「處理」的對象語意不合。head for：前往（某地），受詞是地點，不是人。look into：調查、研究，受詞是事件或問題，調查自己的女兒也接不上語意。
turn to somebody（向某人求助、請教某人）、turn to page 10（翻到第十頁）、deal with（處理、應付）、head for（前往…）、look into（調查）、keep abreast of（跟上…的最新狀況）。
Anita was shopping with her mother and enjoying it. Interestingly, both of them 16 buying the same pair of jeans. According to a recent marketing study, young adults influence 88% of household clothing purchases. More often than not, those in their early twenties are the more 17 consumers. There isn't a brand or a trend that these young people are not aware of. That is why mothers who want to keep abreast of trends usually 18 the experts－their daughters. This tells the retailers of the world that if you want to get into a mother's 19 , you've got to win her daughter over first.
With a DJ playing various kinds of music rather than just rap, and a mix of clothing labels designed more for taste and fashion than for a precise age, department stores have managed to appeal to successful middle-aged women 20 losing their younger customers. They have created a shopping environment where the needs of both mother and daughter are satisfied.