---I wonder what makes you a good salesperson.---I _______ as a waiter for three years, which contributes a lot to my today’s work.A. serve B. have servedC served D. had served
He lived in London for 3 months, during his English improved a lot.
_______ has already been pointed out, grammar is not a set of dead rules.
He was hiding behind the door_______ he could see what was happening.
Carol said the work would be done by October, _______ Personally I doubt very much.
After living in Paris for fifty years he returned to the small town_______ he grew up as a child.