题目内容
Polar bears live mostly on ________ sea ice, which they use as _______ platform for hunting seals.
A. a; a B. a; the C. 不填; a D. the; 不填
C
解析: ice 是不可数名词,在这里是泛指。不可数名词即使前面有半泛指性定语也不加the. 如:Chinese history; platform 是可数名词, 用a表示泛指
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