1.I will write to you soon.（改为同义句） I ___ ___ ___ write to you soon.

1.I will write to you soon.（改为同义句） I ___ ___ ___ write to you soon.
2.I'm going to come back on September 12.（对划线部分提问）
___ ___ ___ ___ ___ come back?(划线部分为“on September 12”