Translate the following sentence into English.
我们交卷前要仔细检查，以确保没有错误。
【正确答案】：
WE SHOULD CHECK OUR EXAMINATION PAPERS CAREFULLY BEFORE HANDING THEM IN TO MAKE SURE THAT THERE IS NO MISTAKE.
【题目解析】：
考点：交卷hand in；卷子examination papers；仔细检查check...carefully；确保make sure。