Writing · Easy–Medium
One sentence each — the best return on study time.
Item 52 asks you to write one sentence that fits a blank in an expository (informational) text. It's paired with item 51 — 10 points each, 20 points combined — and since you only need to judge the form of a single sentence, it's one of the most efficient sections on the whole test. Instead of the actual written-response format, this site reworks it into four-option multiple choice: pick the sentence pattern that fits the blank. The sentence patterns that show up in expository texts fall into two broad groups. One is reversal expressions used to partly overturn what the previous sentence said — things like '그렇다고 ~는 것은 아니다' ('that doesn't mean...') and '~만 ~하는 것은 아니다' ('not all... just because...'). The other is expressions that explain a natural result or purpose, like '~게 된다' ('comes to...'), '~도록 한다' ('so that...'), '~을 수 있게 된다' ('becomes able to...'). If you first work out the relationship between the sentences before and after the blank — reversal, or result/purpose — the pattern that has to go there is almost automatically decided. This unit uses three different expository topics — caffeine and focus, sleep and memory, fine dust and masks — to practice both pattern groups. The wrong options reuse the same three point-losing factors as item 51 — a missing final ending, a mismatched honorific level, and a wrong particle. Since an expository text is written from start to finish in the plain written style ('-ㄴ다/-다'), a single trace of casual speech or spoken style gives it away instantly. Like item 51, item 52 is a spot you can lock down for sure with a short amount of study. Once you have learned just a few sentence patterns properly, you can narrow down the answer without reading the passage closely.
Item 52 is a spot where reading just the relationship between the sentences before and after the blank almost automatically decides the pattern. Memorize the reversal and result pattern sets and you can lock it down without mistakes.