---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
–Come on, please give me some ideas about the project. –Sorry, with so much work __________ my mind, I almost break down.
It is in the city ________ you’re going to pay a visit to _______ this kind of beer is produced.
It was ________ she got home ________ she found her diamond necklace missing.
While watching television, _______________________.
_______ by greater demand of vegetables, farmers have built more green houses.