After three hours' hard work,you need to____yourself.(relax)

After a three hours ' long walk ,zhe boys look rether After three hours' hard work,you need to____yourself.(relax) They ___ ___ (休息)three hours after hard work. 英语I‘m so tired after ____walkI‘m so tired after ____walka.three hours b.three hours' c.three hour's d .three hour after-hours How long can the naughty boy do his homework quietly?A.at three B.For three hoursC.Three hours ago D.After three hours Mr.Green will be back______ A.in three hour's time B.after three o'lock C.three hours laterMr.Green will be back______A.in three hour's time B.after three o'lock C.three hours later Mr.Green will be back______A.in three hour's time B.after three o'lock C.three hours laterMr.Green will be back______A.in three hour's time B.after three o'lock C.three hours later There will be a football match _____.There will be a football match _____.A three hours late B three hours laterC after three hours D in three hours 初中英语奥赛题The headmaster will be back______A.in three o'clock B.after three o'clockC.three hours after D.after three hours为什么答案是B?其他答案（尤其是D）哪里不对? I want to have a rest after three ___ work.(hours/hours') 选哪个 谢谢,请说明下原因,谢谢! three,usually,class,after,we,hours,soccer,for,have英语连词成句 After class,I play volleyball of three hours.错在哪 Jill wants to have a rest after three hours' work.怎译? she was very tired after walking for three hours.中为什么用walking? three I after gymnastics class have for hours 合成一句怎么合 Three hours (late,after,before,later),they came home from the park after three hours of waiting for the train,our p_____finally went to end.