问题描述：
英语翻译
before the exam,he didn't work hard and ___ up ___it.
up是怎么回事?
before the exam,he didn't work hard and ___ up ___it.
up是怎么回事?
问题解答：
我来补答展开全文阅读
问题描述：
问题解答：
我来补答