Since its way of altering moods is generally expected and socially acceptable, oftentimes it 22 over drinking.
答案：(C) results in
result in（導致）表示因為酒精帶來的心理改變被社會普遍接受，往往因此演變成／導致過量飲酒的結果；applies to／arrives at／plans on 均不符合此處因果語意。
四個選項都是「動詞加介系詞」的組合，形態一樣，你會憑中文挑一個。
鑑別度高達 57。先看空格前後各是什麼：主詞 it 指的是前面講的那件事——酒精改變情緒的方式被社會普遍接受；空格後面是 over drinking（飲酒過量）。前面那件事是原因、飲酒過量是結果，所以要的是一個「導致」的說法——result in，它後面接的正是結果。填進去讀成 oftentimes it results in over drinking（往往就導致飲酒過量）。同一篇第 21 題的 lead to 也是「導致」，兩個可以擺在一起記：result in 與 lead to 後面接的都是結果，而 result from 後面接的是原因，方向相反。
applies to（適用於）後面接的是適用的範圍；arrives at 講的是抵達某處，抽象用法 arrive at a conclusion（得出結論）後面接的是想法而不是行為；plans on（打算）的主詞要是人，it 指的是一件事，事情不會自己作打算。
result in（導致，後接結果）、result from（起因於，後接原因）、arrive at a conclusion（得出結論）、apply to（適用於）、over drinking（飲酒過量）、alter one's mood（改變心情）。
Recent studies have shown that alcohol is the leading gateway drug for teenagers. Gateway drugs are substances people take that 21 them to take more drugs. Alcohol works directly on the central nervous system and alters one's moods and limits judgment.
Since its way of altering moods (changing one's state of mind) is generally expected and socially acceptable, oftentimes it 22 over drinking. Habitual drinkers may find alcohol not stimulating enough 23 and want to seek other more stimulating substances. 24 a circumstance often preconditions teenagers to the possibility of taking other drugs such as marijuana, cocaine or heroin.
Another reason why alcohol is the main gateway drug is that the 25 of teenagers it can affect is very wide. It is easily accessible in most societies and common in popular events such as sports gatherings and dinner parties.