_____ hard work it is 填什么

_____ hard work it is 填什么 （ ）hard work it is!是填How还是What? it is a hard work还是it is hard work learning is（ ） 填a hard work还是hard work The work is so hard that it takes me _____ time to finish it As a student,your task is _____(work) hard.怎么填?为什么? Though he is clever,_____ he doesn't work hard.yet可以填吗? As a student ,it's our _____ to work hard.是填job呢还是填duty呢? It's _____ hard work,_____ we need help. ( ) hard work it is!填How还是 What还是 What a Endlish is ( ).Please work hard at it. It is hard (完成) the work