初三英语单选,请讲一下原因your brother often disagree with you,( )he?( ),

初三英语单选,请讲一下原因
your brother often disagree with you,( )he?( ),we often have different opinions.A.does.yesB.doesn‘t.yesC.does.noDdoesn‘t.no 为什么不能选A啊.Two days_____enough for me to finish the work.I need a third day.A.isn‘t.B.is.C.aren’t.D.are.但是这不是复数吗?________I open the window?It is too hot here.AwillBdoCshallDwould