―Have you finished your composition already?―Yes. I it in twenty minutes.A. have finished

问题补充：

―Have you finished your composition already?

―Yes. I it in twenty minutes.

A. have finished

B. finished

C. will finish

D. had finished

答案：

A. have finished

(答案→)B. finished

C. will finish

D. had finished

解析：由答句中的Yes可知in twenty minutes不是表示20分钟后的将来，而是表示在20分钟之内。因为是陈述过去的某个事实，故用一般过去时。