请问this is hard work 和 this is a hard work 有何区别

请问this is hard work 和 this is a hard work 有何区别 this is ____ ,so we must ____ on it.A.a hard work;hard work B.hard work;work hardC.hard work;hard work D.a hard work;work hard she is going to work hard at English this term 对work hard at English提问 This is hard work.(改为感叹句,用两种句型） this love needs hard work to work This is a hard work a an 可以修饰抽象名词呀 但老师说hard work 也没讲清楚 请问是Making money is hard work对还是Making money is a hard work 请说明充分的理由. is such _____that you must_____on itA.hard work,work hard B,a hard work,hard work C.hard working,work hard D.work hard ,work hard 请大家帮忙分析句子结构Is this what i come home to after a hard day's work 请问what在从句中充当什么成分? work hard work will save you ,work is the only think that will see you through this this question is very hard.None of us can work it out.(保持原意）this question is ______ hard for ________of us to work out She is going to work hard at English this term.对work hard at English 提问.______ _________ she ___ _____ _____ this term? To finish the job is ___ .You must ___ .A.hard work;hard workB.work hard:work hardC.hard work:work harkD.a hard work;work hard 一个英语问题：lt is hard ＿ ＿(finish)this work in so short a time Yes.Work hard!This is the most important for a lifetime he works hard,because this is ( )important work A.a B.an C.the D./ Is this what l come home to see a_____ a hard day's work? this is because they like to get up late_a week;s hard work 填写横线中的