riddle:why do birds fly south for winter

riddle:why do birds fly south for winter 脑筋急转弯 Why do birds fly south? Why do birds fly south for winter why do birds south in the winter? why do birds suddenly appear,every time you are near 是什么歌? do you see birds work?no,but they never die from starvation.why is that? why is ten afraid of seven?an english riddle Riddles:Why do people go to bed?Why do birds fly south?wo de ying yu xue de bu hao= =. do you know the answer of the riddle? 英语翻译1.Why do birds fly to south?2.There is four mistake in this centence.Can you find them? 求jonathan clay 的《close to you》歌词 不是 Why do birds suddenly appear 为什么鸟儿忽然出现.这个 英语：_______do you go to watch birds in the zoo with your classmates?A.Why doB.Why notC.Why don'tD.Why not do就当题目没错来做 --- Why do you want to go to the wetland?--- ______ the different kinds of birds living there.A.KeepingB.To studyC.To keepD.Study选什么,为什么 riddle &puzzledifference? Riddle是什么意思 riddle是什么意思 英文does 和do 的用法?Why does the sun go on shining?Why does the sea rush to the shore?Don't they know it's the end of the world'Cause you don't love me anymore?Why do the birds go on singing?Why do the stars glow above?前面两句为什么用 where do the birds come back from?