---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
. My brother is fifteen, but he talked as if he ________ the Long March.
. Lily _____ her parents has gone to Australia for the holiday.
. He tried to be ______, but his trembling hands gave him away.
. He's smart enough to know that if he________that crowd, he's to be punished by his father sooner or later.
. The old couple were not used to _____ in the noisy city.