But the culinary art of dim sum 17 , for it was considered inappropriate to pair tea with food.
答案：(B) had yet to develop
【句型】had yet to 字詞搭配「尚未」，表示點心的烹飪藝術「尚未發展」，因為當時認為茶配食物不恰當；would hardly develop（不太可能發展，語意不合，這裡是講「尚未」而非「不太可能」）、was fast developing（正快速發展，語意相反）、had almost developed（幾乎已經發展，語意相反）都不合。
yet 你最熟的用法是擺在否定句或疑問句的句尾：I haven't finished yet.／Have you eaten yet?——句子裡一定看得到 not 或問號。所以看到 had yet to develop 這種「長得像肯定句」的寫法，你很容易讀成「已經發展了」，正好翻反。劍橋《English Grammar Today》的 Yet 條目說明 yet 多半用於現在完成式的否定句與疑問句、置於句尾；而劍橋辭典另立 have yet to 詞條，直接定義為「還沒做某事」（have yet to do sth ＝ have not done sth），例句如 They have yet to make a decision.（他們還沒做出決定）。換句話說，have／had yet to 是形式肯定、語意否定，這正是本題答對率被壓到 44% 的原因。
關鍵在空格後的 for 子句：for it was considered inappropriate to pair tea with food（因為當時認為茶配食物並不恰當）。for 在這裡是對等連接詞「因為」，交代的是點心還沒出現的理由。既然「茶配食物被視為不恰當」，點心這門手藝當然還沒誕生。再看下一段開頭 Centuries later, the ability of tea to aid in digestion finally became known.——finally（終於）這個字回頭確認了：在那之前一直是「尚未」的狀態。時態上用過去完成式 had yet to，把「尚未」的時間點定在整段過去敘事之前，也完全吻合。
would hardly develop 是「不太可能發展」，講的是可能性高低，但下一段點心明明就發展出來了，語意矛盾；was fast developing（正快速發展）與 had almost developed（幾乎已發展成形）方向完全相反，而且都跟後面「茶配食物不恰當」的理由接不起來——只要抓住 for 子句是在解釋「為什麼還沒有」，這兩個選項立刻出局。
have／has／had yet to V（尚未……）、be yet to V（同義，較正式）、not yet（還沒）、as yet（到目前為止，多用於否定）、the best is yet to come（好戲還在後頭）。順帶分清一組常錯的：yet（還沒，用於否定與疑問）、already（已經，用於肯定）、still（仍然，表持續）。
The history of dim sum stretches back to the early days of the Silk Road, an ancient network of trade routes connecting the East and the West. Those who traveled along the routes through China needed places to rest. Teahouses thus sprang up to 16 the weary travelers, offering them a cup of tea to help them regain energy. But the culinary art of dim sum 17 , for it was considered inappropriate to pair tea with food.
Centuries later, the ability of tea to aid in digestion finally became known. Teahouse owners therefore began providing bite-sized snacks as an accompaniment, and the tradition of these Cantonese delicacies was born.
Dim sum is more than just an example of Chinese cuisine. It is 18 an enjoyable dining experience that can span hours. The small portions were designed to merely "touch the heart," as the name literally means, and 19 were first enjoyed as snacks. The small size allows the customer to order a great variety of dishes, creating a banquet of different tastes and flavors. It is customary for big groups to enjoy simple dishes together as 20 . Ultimately, dim sum—the food—is only a small part of the dim sum experience.