问题补充：
--- I promise to go shopping with you if you help me with the housework.
--- You are the last person to keep a promise.
A. That’s great!
B. How come?
C. I don’t agree.
D. Come off it!
答案：
A. That’s great!
B. How come?
C. I don’t agree.
(答案→)D. Come off it!
解析：考查交际用语。A太棒了！B怎么会？C我不同意；D住口，住手。句意：——如果你帮助我家庭作业，我答应和你一起去买东西。——住口吧！你是最不信守诺言的人。故D正确。
