I fly,yet I have no wings.I cry,yet I have no eyes.Darkness follows me; lower light I never see

I fly,yet I have no wings.I cry,yet I have no eyes.Darkness follows me; lower light I never see A puzzle I have streets but nopavement.I have cities but no buildings.I have forests yet no tree.I have rivers yet no water.What am I fly,but I have no wings.I cry,but I have no eyes.是什么谜底呀 Have you been a teacher yet?no,___ a.Not yetHave you been a teacher yet?no,___ a.Not yet b.I haven't. Have you heard from him___?-No,I haven't___.(already;yet) Have you finished your homework yet?No,but I ____ (doing) it yesterday afternoon -Have you handed in your homework __?-No,I haven't finished it __.A.already; too B.yet; alreadyC.already; ever D.yet; yet have you finished your homework?_________ A.yes,no yet B.just C.hear of D.no,i'didn't i have no I have no idea i have no questions. I have no i have no problem! I have no question! I have no I have no language ---Have you finished your work yet?---No,not yet.I think it’ll take ____ ten minutes.A.another B.other C.others D.more4.Roy made several kites,but _____ of them can fly high in the sky.A.neither B.none C.all D.most5.---Will you be back ____ five in Have you returned the books to library?- A.Yes,I did B.NO,Idon't C.NO,I hadn't D.NO,not yet为什么选D原因