1.While walking along the _______,he found footprints on the _______.A.sand;sand B.sands;sands C.sand;sands D.sands;sand2._____he gave me A.What a good advice B.How a good advice C.What good advice D.How good advice3.There are many_____-shoes in this

用适当的介词填空：1.The bank is ___ the street.2.Be careful while walking ___ the street. while we were walking yesterday afternoon.the bell rang. you shouldn't eat or drink while walking,为什么要用walking _____ on a clear day,far from the city crowds,the mountains give him a senA：If walking B：Walking C：While walking D：When one is walking 连词成句：1.was while walking i saw to i a in cat school a tree连词成句：1.was while walking i saw to i a in cat school a tree 2.i speaking to you you the were while saw teacher walking walking walking While I was walking in the street,I met Liu Dehua.转化为I met Liu Dehua while I was walking in the street.while换when, 用When或while连接以下各组句子1.I was walking to school. + I met a friend_____________________________________________2.My friend broke his leg. + He was playing football___________________________ 连词成句（求大神解答）1.was,while,walking,i,saw,to,i,a,in,cat,school,tree 2.said,he,living,he,in,was,london 3.i,speak,to,you,you,the,were,while,saw,teacher while walking walking the dog ,you were careless and it got loose and was hit by a car in the street,a terrible car accident happened,resulting in three deaths. A While walking B Walk C Walking D When I was walking 1.the boy was walking down the streetwhen the UFO landed.2.while the boy was walking down the street,the UFO landed.3.the girl was shopping when the alien got out.4.while the girl was shopping,the alien got out.5.i am mad at marcia.6.she said she was ____ across the railway ,a train hit it.A While walkingB Walking slowlyC As it was walkingD While the sheep was walking While the boy was walking down the street,the UFO landed,对While the boy was walking down the street提问 They kept on walking ＿＿they found a lake.填while还They kept on walking ＿＿they found a lake.填while还是when? eg：while walking the dog 为状语从句的省略 所以,while后面都加ieg：while walking the dog 为状语从句的省略 所以,while后面都加ing形式?