This situation is so strange to us that we do not know what will 29 of it.
答案：(D) become
what becomes of sb/sth 是固定句型，意為「某人／某事將會變成怎樣、下場如何」；happen 要搭配 to（what will happen to it），occur to sb 是「某人想到」，appear 語意不合。
become 你大概只記得「變成」，後面直接接名詞或形容詞（become a teacher 成為老師）。what becomes of… 的意思是「…會落得什麼下場、後來怎麼了」：What became of that young man?（那個年輕人後來怎麼了？）
四個選項都是動詞，判斷的依據在空格後緊接的介系詞。空格後印著 of，因此要找的是能與 of 搭配的動詞。這四個字各有慣用的搭配：become of 表示「下場如何」，happen 要接 to，occur 接 to 再接人是「某人想到」，appear 不接這類介系詞。四者之中只有 become 能與 of 連用，全句 we do not know what will ___ of it 意為「我們不知道它將會變成怎樣」。凡是空格前後印著介系詞的題目，判斷步驟相同：先看那個介系詞，再回頭檢查各選項慣用的搭配。
happen 與 become 在中文裡都可譯為「發生、變成」，但 happen 的慣用搭配是 happen to sb／sth，如 What will happen to it?（它會發生什麼事？）；本句的介系詞是 of，故不能選。occur to sb 是「某人想到」，主詞須是想法。appear 是「出現、顯得」，不與 of 構成這個說法。
What becomes of…?（…會落得什麼下場）、happen to sb（發生在某人身上）、occur to sb（某人想到）、deal with（處理）。其中 deal with 這一組考過 4 個年度，99 年第 18 題 →、104 年第 19 題 →、109 年第 18 題 →都出現過。
It is a usual sunny afternoon in the village of Midwich, England. It seems not 21 any afternoon in the village, but all of a sudden, people and animals lose consciousness. 22 they awake, all of the women of child-bearing age have become pregnant.
This is an episode from a 1960 science fiction story. The women in the story 23 birth to children that have the same appearance. They all have blond hair and "strange eyes." 24 the children grow, they run around the village in a pack, wearing identical clothing and hairstyles, staring at everyone impolitely. 25 one child learns is also known by the others instantly. Villagers begin to 26 their belief that the children all have "one mind."
In this story, the children are produced by some unexplained force from outer space. But this story written 40 years ago 27 predicted the arrival of a recent method of genetic engineering—cloning. Cloning is the genetic process of producing copies of an individual. Will the genetic copies of a human really have "one mind" as 28 in this story? This situation is so strange to us that we do not know what will 29 of it. Faced with this new situation, people have 30 to find out how to deal with it.