用适当的单词,短语或句子补全对话
Father:Youhavebeenworkinghardonyourstudiesthesedays.
1.__________
Son:Yes,verytired.ButIhavetokeepworkinghard.Youknow,thefinalexamiscomingsoon.
Father:Iknowit's2.____________toyou.
Son:Yes,it'smoreimportantthananyotherexam.
Father:3._________Butyoudon'tneedtoworryaboutit.
Well,Idon'tworryaboutothersubjects,butChinesetroublesmealot.I'mafraid4.__________.