three day 要+s么?

three day 要+s么? Yesterday was the supermarket's opening day.I bought___eggs at a discount为什么要填three dozen而不是three dozens of three dozen of three dozens I have a （ )holiday.A.three-day B.three－days C.three days D.three day‘s two or three day与two or three day`s time的区别?如题 we have a _____ holidayA.three days B.three-days C.three day's D.three days' soon shall we start the bicycle trip?A In three days' time B After three daysC In three day's D After three day's time为什么 How soon shall we strat the bicycle trip ___A.in three day's B.after three days C.in three days'time D.After three day's time ---how soon shall we stat the bicyle trip?A in three day's B after three daysC in three days' time C after three day's time he is leaving for shanghai _____time to have a meeting.A.in three day's B.after three day's C.after three days' D.in three days' I'll arrive in three -------(day's,days')time. it's necessary for you___(eat)three meals a day three- day,three days,three days',three day's区别?three- day + timethree days + timethree days' + timethree day's + time都有什么区别?都在哪个时态里用?（可答可不答） -Good news.We will have a___holiday.-I've heard it.But it's coming in____.A.three days;three days' time B.three days';three days' C.three-day;three days D.three days;three-day time how soon shall we start the bicycle trip?A In three day's time B After three days C In three day's Good news.we'll have a( )holiday.I have heard of it.But it's coming in( ).A.threeA.three days/three day's time B.three day's/three day'sC.three-day/three days D.three days/three ddaystime three day off three meals a day on day three