The entire island of Kizhi is, 18 , an outdoor museum of wooden architecture created in 1966.
答案：(A) in fact
語意「整座島嶼事實上是一座露天博物館」，in fact（事實上）符合這種補充強調說明；once again（再次）、as usual（照常）、for instance（例如）都不合。
四個選項都是常見的轉承語，插在 is 與 an outdoor museum 中間，代進去唸起來都不太卡。最多人猶豫的是 for instance，因為下一句馬上列出 windmills、boathouses、chapels 一大串，看起來就像在舉例。
先問前後兩句是什麼關係。前面兩句在講基日島的地理：長約 7 公里、寬 0.5 公里，周圍還有約 5,000 座島嶼。到了這一句，作者把整座島說成「一座露天博物館」——這座島當然不是真的蓋了一間博物館，而是「實際上等於」一座博物館。這種把前面的敘述再往前推一步、給一個更強或更精確說法的位置，用的就是 in fact（劍橋 English Grammar Today 把 in fact 歸在強調或修正前述內容的用法）。順帶注意它的位置：夾在 be 動詞 is 與主詞補語 an outdoor museum 之間，用兩個逗號夾住。轉承語出現在句子中間非常常見，不要因為它沒放在句首就先排除。102 年第 17 題的 on the other hand 也是插在主詞與動詞之間，同一個考點。
once again：再一次，前文必須已經發生過同一件事，本文沒有。as usual：一如往常，需要有慣例可以對照，本文也沒有。for instance：舉例來說，後面接的必須是前一句的例子；但這一句不是例子，而是對整座島的重新定義。真正的舉例出現在下一句 including windmills, boathouses, chapels…，而且那裡用的是 including，不是 for instance。
in fact（事實上）、in reality（實際上）、once again（再一次）、as usual（一如往常）、for instance（舉例來說）、an outdoor museum（露天博物館）。
Kizhi is an island on Lake Onega in Karelia, Russia, with a beautiful collection of wooden churches and houses. It is one of the most popular tourist 16 in Russia and a United Nations Educational, Scientific, and Cultural Organization (UNESCO) World Heritage Site. The island is about 7 km long and 0.5 km wide. It is surrounded by about 5,000 other islands, some of 17 are just rocks sticking out of the ground.
The entire island of Kizhi is, 18 , an outdoor museum of wooden architecture created in 1966. It contains many historically significant and beautiful wooden structures, 19 windmills, boathouses, chapels, fish houses, and homes.
The jewel of the architecture is the 22-domed Transfiguration Church, built in the early 1700s. It is about 37 m tall, 20 it one of the tallest log structures in the world. The church was built with pine trees brought from the mainland, which was quite common for the 18th century.