问题补充:
—How much the pair of trousers ?
—Sixty dollars enough .
A. is, is
B. is, are
C. are, is
D. are, are
答案:
(答案→)A. is, is
B. is, are
C. are, is
D. are, are
解析:trousers,裤子,本身是复数,但用a pair of 表示量时,单复数看pair的量。问句中pair是单数,故系动词用is。时间,路程,金钱作主语看成是一个整体,即单数。句意:这条裤子多少钱?六十美元足够了。故选A。