—Mom when can I go out to play football?—Finish your homework first or I let you go out.

问题补充：

—Mom, when can I go out to play football?

—Finish your homework first, or I let you go out.

A. don

B. didn

C. won

D. haven

答案：

A. don

B. didn

(答案→)C. won

D. haven

解析：考查动词的时态。根据题意“妈妈，我什么时候可以出去踢足球？”“首先完成作业，否则，我不会让你出去的”可知，本句用一般将来时，故用won 。