But some mountain ranges of South America, Africa, and Indonesia are also 26 glaciers and ice sheets.
答案：(A) home to
be home to sth 是固定說法，意為「是…的所在地」，本句指南美、非洲與印尼的部分山脈也有冰河與冰原；covers of、roofs over、room for 都不是與 be 動詞搭配的固定說法。
答對率 28%。
home 你大概只當它是「家」，所以即使認得每個字也不敢選 be home to。它的意思是「境內有、裡面有」，是地理與介紹文的高頻說法：Taiwan is home to more than 400 species of butterflies.（台灣有四百多種蝴蝶）。主詞不限於地方，建築物、校園都行：The building is home to a museum.（這棟建築裡有一座博物館）。
前一句 Glaciers are usually associated with colder climates.（冰河通常讓人想到寒帶）先建立常識，本句用 But…also 翻轉：熱帶山脈「也有」冰河。要說「某地有某物」，最自然的就是 be home to。下一句 These tropical glaciers serve as a major source of water supply 也確認冰河確實存在於當地。
covers of、roofs over、room for 都不是英文說法；要說「有空間容納」得用 have room for，不能寫成 be room for。
be home to（是…的所在地、境內有）、have room for（有空間容納）、at home（在家、自在）、feel at home（賓至如歸）、a roof over one's head（安身之處）。
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.