"Why was the river rich?

Why was the river rich? Why is the river rich? why is the Yellow River yellow? why the river is so rich why they say that the nile river was a gift to the ancient egyptionshelp me i'm in canadaalesson is about the ancient egypt, the nile Water was flowing out of the river. – Do you know why the river was polluted?-- Many different factors ___________ the serious pollution of the river.A.contributed to B.adjusted to C.were accustomed to D.were attached to The river is two metres long 是否等于The river is two metres in length?Why? It's raining these days,the river ___ two feet.A.has raised B.was rising C.is raising D.has risenWhich one?Why? 英语脑筋急转弯：why is the river so rich? ? Why stone age people loved alonh the river? He was _______in swimming across the river.(succeed) in the river there was a big c_____ The river was too deep to across.改错新年快人 完形Once upon a time,there was a river The river lived alone R down the river Soca is exciting.首字母填空,快! Why don't you go swimming in the river?变同意句How about _swimming in the river? 英语翻译However,on 30 August 2005,there was a sharp increase in COD concentration in the river 20km from the source of the Liming River.This suggests that a pollution incident occurred between monitoring stations #3 and #4 on the river.A survey r