You are bound to fail____.

问题描述:

You are bound to fail____.
A.when you adopt this plan or the other
B.whether you adopt this plan or the other
C.if you adopt this plan or the other
D.whichever plan will you adopt
为什么?B呢?

if 表假设 并非表示"是否"的意思 所以不用whether
or 也并非是whether...or...句型 而仅是"或者"的意思