—You looked so tired this morning. How much for the work? —Oh I was just helping my frien

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。