一道英语选择You should go over your test paper before you hand it in.You should go over your test paper ————you hand it in.A beforeB afterC becanseD as soon as

问题描述:

一道英语选择You should go over your test paper before you hand it in.
You should go over your test paper ————you hand it in.
A before
B after
C becanse
D as soon as