.Elephants, which are the largest mammals on the earth, have almost no natural enemies ______ human beings.
After living in Pairs for fifty years he returned to the small town ____ he grew up as a child.
Carol said the work would be done by October, _____personally I doubt very much.
He was hiding behind the door _________ he could see what was happening. A. whichB. from whereC from which D. where
Recently I bought an ancient Chinese vase, _____ was very reasonable.
_____ has already been pointed out, grammar is not a set of dead rules.