The study warned that Papua’s glaciers are only the “first to go” if greenhouse gases are 30 and temperatures continue rising.
答案：(D) left unchecked
leave sth unchecked 是「放任不管、不加抑制」，本句指「若溫室氣體未受抑制」；kept balanced（維持平衡）與後半句 temperatures continue rising 自相矛盾，made released、seen dismissed 兩組動詞搭配本身就不成立。
答對率 17%，鑑別度 10：這是本批最難的一格。
leave + 受詞 + 過去分詞。你把 unchecked 讀成「沒被檢查的」，這很自然，因為 check 你背的就是「檢查」。但 check 當動詞還有一個意思：抑制、遏止（check the spread of a disease 遏止疾病擴散）。加上表否定的字首 un-，unchecked 就是「未受抑制、放任不管」；unattended（無人看管的）、unfinished（未完成的）同理。真正難的在後面：are left unchecked 連著兩個過去分詞，切不對整句就散了。
先把主動句還原：leave [greenhouse gases] [unchecked]。leave 後面是受詞加受詞補語，unchecked 說的是受詞的狀態。改成被動，用受詞當主詞，補語留在原地：greenhouse gases are left [unchecked]。這條路你國中走過：keep the door open（讓門開著）、make yourself understood（讓別人聽懂你的意思），補語都在說受詞怎麼樣了；leave 只是把補語換成過去分詞。再用一主一動驗算：are 是這個子句唯一的動詞，left 和 unchecked 都不是，這樣就不會把 left 讀成「離開」。最後看方向：後半句 temperatures continue rising（氣溫持續上升），前面必須是「放著不管」才接得下去。一句記完：The drains were left unchecked, and one storm turned the whole alley into a river.（排水溝沒人清理，一場暴雨就把整條巷子變成了河。）〔情境取材自 114 學測作文題：颱風停課〕
kept balanced（維持平衡）方向剛好相反，正是答案的反義。made released、seen dismissed 是拼湊出來的，英文沒有這兩種說法。
leave sth unchecked（放任不管）、leave sth unattended（無人看管）、go unchecked（未受遏止地持續下去）、keep sth under control（控制住）。
Glaciers are usually associated with colder climates. But some mountain ranges of South America, Africa, and Indonesia are also 26 glaciers and ice sheets. These tropical glaciers serve as a major source of water supply to one-sixth of the world's population.
A newly published study, however, revealed that rising temperatures are posing an 27 threat to the last tropical glaciers in Indonesia's Papua region. The ice sheets, which once spanned 20 square kilometers, are thinning over five times as quickly compared to a few years ago. 28 already shrunk by 85% to a mere 0.5 square kilometers, Papua's glaciers will completely disappear within a decade, researchers have predicted.
The disappearance of the glaciers will also leave a significant 29 impact. For many indigenous Papuans, the ice sheets represent a sacred symbol. "The mountains and valleys are the arms and legs of their god and the glaciers are the head," explained the head researcher. The study warned that Papua's glaciers are only the "first to go" if greenhouse gases are 30 and temperatures continue rising. And this is certainly a serious warning about the depressing fate of other glaciers around the world.