-Have you finished your composition already?-YesI it in less than ten minutes.A.

问题补充：

---- Have you finished your composition already?---- Yes．I it in less than ten 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：考查时态。句意：你已经完成你的作文了吗？是的，不到十分钟我就完成了。完成的动作在过去，所以使用一般过去式选B。