问题补充:
—You looked so tired this morning. How much for the work?
—Oh, I was just helping my friend.
A. were you paid
B. did you pay
C. would you pay
D. did it cost
答案:
A. were you paid
(答案→)B. did you pay
C. would you pay
D. did it cost
解析:句意:你为这项工作付出了多少?pay…for…为了……付出……,人做主语,故选B。