【推荐1】Perhaps the best example is shown by UNESCO, which runs a program that prevents world cultural heritage sites around the world from _________ (消失). (根据汉语提示单词拼写)

【推荐2】I saw the old man ________ (disappear) in the distance. （所给词的适当形式填空）

【推荐1】By the time of last year, we ______ (build) two bridges. (所给词的适当形式填空)

【推荐2】No sooner _________ the game started than it began to rain heavily. （用适当的单词填空）

【推荐3】Tom wishes that he _____(study) law instead of history when he was in university.