If they stay in a museum too long, a feeling of boredom and monotony will build up, leading 23 to impatience and fatigue.
答案：(B) eventually
leading eventually to（最終導致……）表示無聊感累積後終將演變成不耐煩與疲勞；efficiently／fortunately／permanently 均不符合此處語意邏輯。
四個選項都是 -ly 副詞，形態一樣，你會憑中文哪個順挑一個。
答對率四成六，鑑別度高達 61。空格夾在 leading 與 to 之間，修飾的是 lead to（導致）這個動作。先看整句在講什麼：a feeling of boredom and monotony will build up, leading ______ to impatience and fatigue——無聊與單調的感覺會慢慢累積，最後導致不耐煩與疲憊。關鍵在 build up（逐漸累積）：既然是慢慢累積起來的，導致的結果就是在一段時間之後才出現，所以要的是講時間終點的 eventually（最終、到頭來）。填進去讀成 leading eventually to impatience and fatigue。
efficiently（有效率地）是在評價做事的效率，累積無聊不談效率；fortunately（幸好）是正面的評價，但不耐煩與疲憊不是好事；permanently（永久地）指的是狀態不再改變，但逛完博物館的疲憊會消退，並非永久。三個都是 -ly 副詞，形態吻合，容易被順手選走。
eventually（最終、到頭來）、lead to（導致）、build up（逐漸累積）、impatience（不耐煩）、fatigue（疲憊）、permanently（永久地）。
Young visitors to museums often complain about having museum feet, the tired feeling one gets after spending too much time in a museum. A case of museum feet makes one feel like saying: "This is 21. I could have done the painting myself. When can we sit down? What time is it?" Studies of museum behavior show that the average visitor spends about four seconds looking at one object. For young visitors, the time span can be 22 shorter.
Children are more interested in smells, sounds, and the "feel" of a place than looking at a work of art. If they stay in a museum too long, a feeling of boredom and monotony will build up, leading 23 to impatience and fatigue.
To 24 museum feet, try not to have children look at too many things in one visit. It is reported that young visitors get more out of a visit if they focus on 25 nine objects. One and a half hours is the ideal time to keep their eyes and minds sharp, and their feet happy!