I was hard at work on a term paper有语法错误吗?...hard at work on ...work为什么没有ing呢……还是说答案是错误的呢……

I work hard at school. hard at work school I(? At work,I must work hard I work hard at schoo 和 At school Iwork hard work hard at hard 关于I really enjoyed my day at the studio but it was also hard work的任务型阅读 I was hard at work on a term paper有语法错误吗?...hard at work on ...work为什么没有ing呢……还是说答案是错误的呢…… 英译汉:work hard at work hard at中文 work hard in还是work hard at? After a day’s hard work ,I was really (e I work hard at school.So ____(do)my brother Maths don't I hard at work 组成句子 I work hard at the office.(改为现在进行时) I work hard at all my subjects是什么意思? I think I should work ____(hard) at English填hard还是harder?为什么 I was successful at my job,I work hard.but it offorded me a fabulous lifestyle.句中的but怎么理解,这句话怎样理解 I found it was hard to finish the hard work on time改为同意句I found （ ）hard （ ）（ ）the hard work on time