it is a hard work还是it is hard work哪个正确?

it is a hard work还是it is hard work哪个正确? learning is（ ） 填a hard work还是hard work how hard work 还是what hard work 我认为what hard word it is才对 ( ) hard work it is!填How还是 What还是 What a 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 I don't think it is a hard work 改错紧急 求理由I think it is really （ ）hard work.A.a B.an C.the D.不填 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 是i find it hard to say 还是i find it is hard to say 改错:It is a hard work and he works very hard . 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. _____ hard work it is 填什么 it is hard work怎么解释 It is hard the work befor supper 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 it's (),so we must().A a hard work,work hard B work hard,hard work C hard work,work hard chinese is not easy for me ,but i like it very much .i 'm going to work hard at it.请问这句中的work hard at 是什么意思? It's ______ to look after babiesA a hard work B work hard C hard work D a work hard