问题补充:
of the surface of the earth covered with water.
A. Seven-tens...are
BSeven-tens…is
CSeven-tenths...is
D. Seven-tenths...are
答案:
A. Seven-tens...are
B. Seven-tens…is
(答案→)C. Seven-tenths...is
D. Seven-tenths...are
解析:句意:地球表面的十分之七被水覆盖。分数的基本形式为分子为基数词,分母为序数词,分数视为一个整体,单数,故选C.