俺也来试试,你看对不对哈：
1、How about that 【cold one you promised me】.【……】作为that的同位语.
2、cold one you promised me 为省略句,即 cold one you promised me (to be).(……)为省略内容.
3、正how about that cold one you promised me. = how about that cold one you promised me to be. 译作：你答应过我遇事要冷静的,你做到了吗?