On____side of the street there are a lot of colorful flowers

On____side of the street there are a lot of colorful flowers There are many flowers on____side of the street. ‘----’ sides of the street ‘----’ a lot of colorful flowers on side of the street are a lot of colorful flowers There are a lot of colorful flowers on [ ] side of the stree There are a lot of colorful flowers on sides of the streets. There are many shops on____side of the street. On ___sides of the street there are lots of colorful flowers on___side of the street are a lot of flowers there are some trees on____side of the street.A .both B .all 初三英语On _____ sides of the street are a lot of colorful flowe There are many trees on____side of the street.填each,every为什么