问题
选择题
Nearly _______of the earth___covered by sea.
A．three fourth; is
B．three fourths; is
C．three fourth; are
D．three fourths; are
答案
答案：B
题目分析：句意几乎地球表面的四分之三被海洋覆盖。分数的表达方式：分子用基数词，分母用序数词，当分子超过一了，分母变复数，本题中把地球看做整体，所以谓语动词用单数，故选B。