8.Nearly _________ of the earth ________covered by sea.( 。
A.three fourth; isB.three fourths; is
C.three fourth; areD.three fourths; are

分析 幾乎地球表面的四分之三被海洋覆蓋.

解答 答案:B.
根據(jù)選項(xiàng)可知,第一個(gè)空所缺為分?jǐn)?shù);又知分?jǐn)?shù)的表達(dá)法為分子基數(shù)詞,分母序數(shù)詞,分子大于一,分母加s,所以四分之三的表達(dá)方法為three fourths.又根據(jù)分?jǐn)?shù)作主語時(shí),其后的謂語動(dòng)詞的單復(fù)數(shù)取決于它所修飾的名詞,即此處的earth,這里是單數(shù)形式,所以第二個(gè)空缺處應(yīng)用is.故選B.

點(diǎn)評(píng) 本題考查分?jǐn)?shù)的用法,分?jǐn)?shù)的表達(dá)形式為:基數(shù)詞(分子)+序數(shù)詞(分母),分子大于一時(shí)分母加s.

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