If you want to do the experiment again,you'd better be more careful____you made a mistake.

问题描述:

If you want to do the experiment again,you'd better be more careful____you made a mistake.
A.where
B.in case

应该是省略了 in the experiment,而in case的意思是假使吧,再说了,放在这里当状语也不合适啊