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 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 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 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 learning is（ ） 填a hard work还是hard work he works hard,because this is ( )important work A.a B.an C.the D./ Teaching young children is ,but the teachers always .A a hard work,work hard B 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 Is this what l come home to see a_____ a hard day's work? 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） he works hard,because this is ( )important work A.a B.an C.the D./请写明原因,急, To finish the job is () .You must () .A.work hard ,work hardB.a hard work ,work hardC.hard work ,hard workD.hard work ,work hard本题的考点是什么?本题有哪些语法? it is a hard work还是it is hard work哪个正确? This is ( ) hard work that nobody can do it wellA.such aB.so a C.such D.so Miss Fang is my friend.She is always_______.A .work hard B.hard work C.works hard C hardworking