The main offshore islands consist of Penghu, Green Island, Orchid Island, Kinmen, Mazu, Turtle Island and Little Liuqiu. 24 their locations, land characteristics, and human activity differ, each has its own unique scenery and culture.
答案：(A) As
As在這裡表示「由於/既然」，「既然它們的地理位置、地質特徵、人文活動各不相同，每座島都有自己獨特的風景文化」，符合這種因果邏輯；Although（雖然，轉折不合）、If（如果）、Unless（除非）都不合。
本題大考中心未公布逐題答對率，以下不談數據，只談觀念。
四個選項都是從屬連接詞，而「各島條件不同」聽起來像個對比，很容易挑 Although。但這裡的「不同」不是障礙，正是各島各有特色的原因。
四個選項都是從屬連接詞，可見這一格考的是前後兩件事的關係。前半是 their locations, land characteristics, and human activity differ（它們的位置、地質特徵與人文活動各不相同），後半是 each has its own unique scenery and culture（每一座島都有自己獨特的風景與文化）。條件不同，所以景色文化不同——這是順向的因果，不是牴觸，填 As（由於、既然）。再看下一句：Therefore, each island offers something different for visitors.（因此，每座島為遊客提供的東西都不一樣。）——Therefore 是因果的轉承語，也印證了這一段走的是因果不是轉折。這一格讓 as 在題庫裡的身分補到第五種，可以一次擺出來：本題是「由於、既然」；84 年第 39 題是「如同、正如」（As you can see）；86 年第 23 題與 87 年第 31 題是「當……的時候」；91 年第 24 題是「隨著」；94 年第 18 題是介系詞「以……的身分」。判準始終同一句：先看後面接的是子句還是名詞，再看語意。
Although（雖然）：讓步要求前後互相牴觸，但條件不同與各有特色是同一個方向。If（如果）：帶出假設，而各島條件不同是既成的事實，不是假設。Unless（除非）：帶出排除性的條件，語意完全不通。
as ＋ 子句（由於、既然）、since ＋ 子句（既然、因為）、differ（不同）、be different from（與……不同）、unique scenery（獨特的風景）、consist of（由……組成）。
Are you looking for a place where the waters are clear and the skies are blue, and countless stars cover the sky at night? Or would you like to 21 through remote and picturesque fishing villages? Then pack your bags and visit the offshore islands of Taiwan!
Taiwan is located along the southeast coast of the Asian continent, on the line 22 the Euro-Asian and Philippine continental plates meet. This unique geographic location and frequent earthquake activity not only created an extremely diversified landscape and natural environment on Taiwan, but also resulted 23 the diverse traits of its offshore islands.
The main offshore islands consist of Penghu, Green Island, Orchid Island, Kinmen, Mazu, Turtle Island and Little Liuqiu. 24 their locations, land characteristics, and human activity differ, each has its own unique scenery and culture. Therefore, each island offers something different for visitors. 25 you prefer to explore nature or history, or go shopping or sport fishing, you can do it all here!