This kind of practice allows students to learn from mistakes in a safe environment that would not be 15 with textbooks alone.
答案：(C) possible
would not be possible with textbooks alone 意為「單靠課本做不到」：這種在安全環境中從錯誤中學習的練習，光靠課本無法做到；exciting、necessary、important 都無法與 would not be…with textbooks alone 構成合理語意。
答對率 28%。
這題的難處不在單字，在句子的結構：a safe environment that would not be ___ with textbooks alone，要把 would not be、with textbooks alone 三個部分合起來讀，才知道整句在說「單靠課本辦不到」。
前一句舉例說明模擬病人可以設定成對某種藥物過敏、學子用錯藥就會出現嚴重反應。這種「犯了錯也不會真的害到人」的環境，正是課本給不了的。所以空格要填 possible——與 would not be 合起來是「不可能存在」。
alone 放在名詞後面時是「光靠、僅僅」（Money alone can't buy happiness.），本句 with textbooks alone ＝「單靠課本」，語氣本身就在暗示「還需要別的東西」。
would not be possible（不可能做到）、make sth possible（使某事成為可能）、if possible（可能的話）、with…alone（單靠…）、learn from mistakes（從錯誤中學習）。
Keele University in the United Kingdom has developed a "virtual patient," created by a computer, to help train the pharmacists of the future. Students in the university's School of 11 work with the "patient" to gain experience in effective communication and decision-making.
Students talk with the "patient" directly or by typing questions into a computer. The "patient" responds verbally or with gestures to indicate 12 such as pain, stress or anxiety. As a result, students are forced to communicate clearly 13 that the "patient" understands them completely.
The Virtual Patient can also be used to explore various medical situations. For example, the "patient" can be programmed to be allergic to certain medicine and can 14 serious reactions if student learners are not aware of the situation. This kind of practice allows students to learn from mistakes in a safe environment that would not be 15 with textbooks alone. The unique system can both be used in a classroom setting or for distance learning.