问题补充:
—I wonder how much you charge for your services.
—The first two are free the third costs $30.
A. while
B. until
C. when
D. before
答案:
(答案→)A. while
B. until
C. when
D. before
解析:while是并列连词,表示对比,意为“而”。
时间:2018-09-12 01:01:58
—I wonder how much you charge for your services.
—The first two are free the third costs $30.
A. while
B. until
C. when
D. before
(答案→)A. while
B. until
C. when
D. before
解析:while是并列连词,表示对比,意为“而”。