英语谜语:Why is a river rich?

英语谜语:Why is a river rich? 谜语:why is a river so rich? why is a river rich? 两个英语谜语...急 1.why is river rich?2.what letter stand for the o 英语趣味回答：why is river rich? Why is a river very rich? Why is a river rich?Because___________ why is a river so rich? (脑筋急转弯)Why is a river rich? Why is the river rich? 一到英语智力题Why is a river rich?Because it has two ______. 几道英语谜语1）What do we say that a river is very rich?2)What will