—________ of the Earth is covered by water?
— Three quarters.
A . How long B . How big C . How much D . How many
C
【详解】句意: —— 地球上有多少被水覆盖? —— 四分之三。
考查疑问词辨析。 How long 多长时间; How big 多大; How much 多少,后跟不可数名词; How many 多少,后跟可数名词复数。根据 “of the Earth” 和 “Three quarters” 可知,空后是不可数名词,对分数提问,用 how much 。故选 C 。
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