It's hard work.work不可数吗?

It's hard work.work不可数吗? it's (),so we must().A a hard work,work hard B work hard,hard work C hard work,work hard It's ______ to look after babiesA a hard work B work hard C hard work D a work hard It's hard work.写成感叹句 It ' s ----,we have to work hard .( ) A a hard work B ,an easy work C.hard work it's (a hard job)to look after a garden.为什么不能用a hard work it‘s——to look after babies.A.a hard work B.hard work It’s hard finishing the work in two days.改错 T________it's hard work,I enjoy it.空里填什么? it was hardly hard work Hard work leads to s ---- It's a hard work for me to work out shis problem.请将上句改错 She does not work so hard as you.为什么work不加s Tom feel it hard to mix work and pressurefeel为什么不加s?TOM是第三人称吧?. work work hard Work hard work hard It's______,so you must ______ to finish it.A.hard work ,hard work B.hard work ,work hard C.work hard,hard workD.work hard ,work hard（选择）