It's ____difficult for him to finish all the homework within a day(realize)

It's ____difficult for him to finish all the homework within a day(realize)
It's ____difficult for him to finish all the homework within a day(realize)

It's ____difficult for him to finish all the homework within a day(realize)
It's （really,的确） difficult for him to finish all the homework within a day.
要在一天之内完成所有的工作,对他来说真的太难了.

really 对他来说在一天内完成所有的作业真的很困难