1.It becomes rapids as it passes through deep valleys,travel

The rain __dirty as it falls through dirty air.为什么是becomes,不 As modern life becomes busier,it also becomes more sedentary As our lives get busier it becomes more important He passes it to Mike. 英语翻译As we grow older,it becomes difficult to just believe.It It's an animal.people can ride it to travel through a desert 英语猜谜：It's an animai.People can ride it to travel through a d When metal becomes hot,it() the great wall wind it way over high mountains ,through deep Feel it deep It kills me deep 1.If water is ________(hot),it becomes steam.