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。
答對率 30%。
become 你大概只記得「變成」，後面直接接名詞或形容詞（become a teacher）。what becomes of… 把 become 與 of 綁在一起，字面看不出「變成」的影子：它的意思是「…會落得什麼下場」。What became of that young man?（那個年輕人後來怎麼了？）
become 「of」（下場如何）／happen 「to」（發生在…身上）／occur 「to」（某人想到，An idea occurred to him.）／appear 不接這類介系詞。空格後面已經印好了 of，只有 become 配得上——「先看空格後的介系詞，再回頭挑動詞」，這是最快的解法。
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）。
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.