问题补充：
— Sorry, I forget to post the letter for you.
— Never mind, ＿＿ it myself tonight.
A. I’m going to post
B. I’ve decided to post
C. I’ll post
D. I’d rather post
答案：
A. I’m going to post
B. I’ve decided to post
(答案→)C. I’ll post
D. I’d rather post
解析：will/shall ＋v.表示临时的决定，而be going to 表示已决定或安排要做的事。
