问题补充：
—You must do as I told you.
— I don’t?
A. What about
B. How about
C. Only if
D. What if
答案：
A. What about
B. How about
C. Only if
(答案→)D. What if
解析：句意：--你必须按照我告诉你的去做。--如果我不那样做又怎样呢？What about/ How about+名词或代词，“……怎么样”； only if只要；What if假使……怎么样呢？
