As a student ,it's our _____ to work hard.是填job呢还是填duty呢?

As a student ,it's our _____ to work hard.是填job呢还是填duty呢? It's hard ____ a job.是填to look for还是to find As a student,your task is _____(work) hard.怎么填?为什么? _____ hard work it is 填什么 （ ）hard work it is!是填How还是What? it's (a hard job)to look after a garden.为什么不能用a hard work it's our duty to get the work ----- A to finish B finishCfin 请问The writer doesn‘t like hard work.It‘s a hard job to look here's a letter___ you 是填to 还是for呢?为什么呢?有什么区别呢? It's ( )our art teacher应该怎么填,是填for,to还是at learning is（ ） 填a hard work还是hard work It's our duty to ____ _____ _______（保护环境）