—Mum I’ve been studying English since 8 o’clockI go out and play with Tom for a while?

问题补充：

—Mum, I’ve been studying English since 8 o’clock. I go out and play with Tom for a while?

—No, I’m afraid not. Besides, it’s raining outside now.

A. Can’t

B. Wouldn’t

C. May not

D. Won’t

答案：

(答案→)A. Can’t

B. Wouldn’t

C. May not

D. Won’t

解析：请求允许原本用may﹑can，用can’t替代语气更强烈。