I will visit my grandma this afternoon?(根据划线部分提问)

您好！

正确答案：

I will visit my grandma this afternoon?(根据划线部分提问)
=Who will you visit this afternoon?

今天下午，我去看望奶奶！
Who will you visit this afternoon?
Who are you visiting this afternoon?

你没划线啊
Who will you visit this afternoon?
When will you visit your grandma?