It is well understood _____ controls the flow of carbon dioxide in and out the atmosphere today

I am afraid I can’t return the book toyou before Friday——

I don’t like Tom’s way of behavior, but ________ I admire( 钦佩) his great knowledge

An actor can not well play the role without life experience ____ more than a dancer can make a differencewithout much practice

Perhaps not in my memory. , it might have been during my early childhood.