—How much the pair of trousers ? —Sixty dollars enough .A. is isB. is areC. are isD. ar

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。