The exhibit, opened in December 2008, 20 scheduled to run for about three years.
答案：(A) is
opened in December 2008 是插入的分詞片語，用來修飾主詞 The exhibit，句子仍缺一個限定動詞，故填 is，構成 be scheduled to（預定）；being 與 having 都是分詞，has 則會使語態變成主動而不合。
答對率 17%。
句子中間插了一段 opened in December 2008，你一看到 opened 就以為那是主要動詞，覺得句子已經完整，於是不知道空格該填什麼。這個插入的分詞片語其實只是修飾語，等於 which was opened in December 2008——把兩個逗號之間的內容遮起來，句子剩下 The exhibit ___ scheduled to run for about three years.，主要動詞的位置立刻現形。
遇到主詞後面接逗號的句子，先確認逗號之間是不是修飾語。若是分詞片語、同位語或介系詞片語，就先遮掉，再看剩下的骨幹缺什麼。這是所有長句題的通用解法。
be scheduled to V 是固定用法，意思是「預定要…」——展覽是「被安排」的，所以用被動形式。主詞 The exhibit 是單數、全文用現在式敘述，因此填 is。
國中學過 The boy standing there is my brother.（站在那裡的男孩是我哥哥）——standing there 是修飾語，is 才是主要動詞。本題只是把現在分詞換成過去分詞。
being 與 having 都是分詞，不能單獨當主要動詞；has scheduled 是主動語態，會變成「展覽安排了…」，但展覽是被安排的一方，語態顛倒。
be scheduled to V（預定要）、be due to V（預計）、run for（持續、上演）、be set to V（即將）、guided tours（導覽）。
Signs asking visitors to keep their hands off the art are everywhere in the Louvre Museum, Paris. But one special sculpture gallery invites art lovers to allow their hands to 16 the works. The Louvre's Tactile Gallery, targeted at the blind and visually 17, is the only space in the museum where visitors can touch the sculptures, with no guards or alarms to stop them.
Its latest exhibit is a 18 of sculpted lions, snakes, horses and eagles. The 15 animals exhibited are reproductions of famous works found elsewhere in the Louvre. Called "Animals, Symbols of Power," the exhibit 19 animals that were used by kings and emperors throughout history to symbolize the greatness of their reigns.
The exhibit, opened in December 2008, 20 scheduled to run for about three years. During guided tours on the weekends, children can explore the art with blindfolds on.