问题描述: I'm going to work hard-----itA.inB.atC.with 1个回答 分类:英语 2014-11-04 问题解答: 我来补答 B.at work hard at: 努力工作(或学习) 例如: 1. If you work hard at other times, you won't have to sit up all night before the exam. 你平时如果努力学习,在考试前就不必这样整夜开夜车了. 2. He worked hard at his biology. 他努力学习生物学. 展开全文阅读