--Did you finish your math exercises?--No I it the day after tomorrow.A. have finishedB.

问题补充：

--Did you finish your math exercises?

--No, I it the day after tomorrow.

A. have finished

B. finish

C. will finish

D. finished

答案：

A. have finished

B. finish

(答案→)C. will finish

D. finished

解析：句意：你完成了你的数学练习了吗？没有。后天我将完成。the day after tomorrow将来的时间，故用将来时态。故选C。