21.I am sorry____________ written you a letter at the time.A.to have not B.to not have C.not to
问题描述：
21.I am sorry____________ written you a letter at the time.A.to have not B.to not have C.not to
到你是哪个啊
答
not to have
原句是i am sorry to 但要否定前移,所以是选C
绝对是这个啊.
翻译：我很抱歉没能及时给你写信.
LZ不妨将I am sorry not to have written you a letter at the time百度下.绝对是正确的句式