Nearly _______of the earth___covered by sea.

A．three fourth; isB．three fourths; is
C．three fourth; areD．three fourths; are

B

解析試題分析：句意幾乎地球表面的四分之三被海洋覆蓋。分?jǐn)?shù)的表達(dá)方式：分子用基數(shù)詞，分母用序數(shù)詞，當(dāng)分子超過(guò)一了，分母變復(fù)數(shù)，本題中把地球看做整體，所以謂語(yǔ)動(dòng)詞用單數(shù)，故選B。
考點(diǎn)：分?jǐn)?shù)的用法

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