You should go over your test paper( ) you hand it in.AbeforeBthoughCbecauseDas soon as...

问题描述:

You should go over your test paper( ) you hand it in.AbeforeBthoughCbecauseDas soon as...
You should go over your test paper( ) you hand it in.AbeforeBthoughCbecauseDas soon as请选择并翻译整句,且重点解释hand in,

A before
在你交试卷之前,你应该再检查一下你的试卷.
hand in 交上;提交;呈送;上交
handit in 这里it指代test paper