--When can I go out to play football Mum? --Finish your homework first or I won't let yo

问题补充：

--When can I go out to play football, Mum?

--Finish your homework first, or I won let you .

A. to go out

B. go out

C. going out

D. will go out

答案：

A. to go out

(答案→)B. go out

C. going out

D. will go out

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