But the collection is not in a museum, and it is not open 22 visitors.
答案：(C) to
【句型】open to + 對象，固定搭配，表示「對……開放」。with／by／among 都不是 open 表達「對誰開放」的正確搭配介系詞。
四個選項都是常見介系詞，形態上都放得進去，你會憑中文的「對……開放」去猜一個。
這一格考的是字詞搭配，沒有推理可做，只能看認不認得：be open to somebody 是「對某人開放」，後面接的是被允許進來的人。填進去讀成 it is not open to visitors（它並不對外開放參觀）。這一型與同一篇第 21 題那種靠結構推的題目不一樣——形容詞配哪一個介系詞是成組記的，中文的一個「對」，在英文裡可能是 to、with、at 或 about，一組一組記下來才可靠。指考 96 年第 11 題考的 be satisfied with 是同一型。
with、by、among 三個都是高頻介系詞，形態上放得進去，容易被順手選走；但 open 固定配 to。open with 是「以……開場」（The concert opened with a song.）；open by 沒有這個搭配；among（在……之中）講的是位置。
be open to（對……開放）、be closed to（不對……開放）、be similar to（與……相似）、be exposed to（暴露於）、open with（以……開場）、guarded warehouses（有人看守的倉庫）。
The world's largest collection of Khmer sculpture resides at Angkor, the former royal capital of Cambodia. The 7,000 pieces—full statues, heads and carved inscriptions—are breathtaking not only for their individual beauty, but also for 21 they represent: a road map to the origins of much of Southeast Asian culture.
But the collection is not in a museum, and it is not open 22 visitors. It is held in unknown, guarded warehouses 23 only a few people can see it. These people assembled it by removing figures from the ruins of Cambodia's world-famous temples and replacing them with hollow, concrete 24. For the most part, these are hard to distinguish from the originals.
Clever art thieves? No, these "art thieves" work for the Angkor Conservancy. 25 very large pieces too heavy to move, virtually all surviving Angkorian statues, wood carvings and artifacts have been replaced with copies.