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.
答案：(C) As
As 在這裡表示「隨著……」（伴隨關係，隨著孩子們長大），表達漸進過程；If（如果）、For（因為）、So（所以）都不合這裡的伴隨語意。
as 在你腦中大概綁著「因為」與「當……時」兩個意思，很少想到它還能表示「隨著」。而 If 帶著「如果」的味道，讀起來又好像講得通，於是就在這兩個之間猶豫。這一格有一招可以先砍掉一半的選項，不必先想語意。
四個選項都能擺在句首，但 For 與 So 有一個共同的性質可以一次刷掉兩個：這兩個字帶出來的內容都要靠前面那句話撐著——For（因為）引出的是前面那句話的理由，So（所以）引出的是前面那句話的結果，兩者都預設「前面已經有一句話了」。而本句的空格就在整句的最前面，前面根本沒有東西可以讓它們接續。剩下 If 與 As，這時才輪到語意：孩子會長大不是一個假設，是一定會發生的事，所以不是 If（如果）；空格後面的 the children grow（孩子們漸漸長大）與主要子句 they run around the village in a pack（他們成群在村子裡跑）是兩件同步展開、隨著時間一起推進的事，這正是 As 的「隨著」用法，整句要說的就是「隨著孩子們長大，他們……」。順便把 as 的兩種身分整理清楚：這裡的 as 是連接詞，後面接完整子句；94 年第 18 題的 as 是介系詞，後面接名詞（as a small child 在他還小的時候）。同一個字，看後面接什麼就知道它是哪一種。
If（如果）：帶出的是還沒發生、也不一定會發生的情況，與「孩子必然會長大」衝突。For（因為）：見上，它引出的是前一句的理由，位置只能在後面。So（所以）：同樣要求前面先有原因。
as time goes by（隨著時間過去）、as the years pass（隨著歲月流逝）、in a pack（成群結隊）、run around（四處亂跑）、identical twins（同卵雙胞胎）、stare at sb（盯著某人看）。
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.