---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 served
C served D. had served
Great changes ______ in my hometown in the last ten years.
| A．took place | B．have taken place |
| C．have been taken place | D．was taken place |
---I think Helen is at home.
---No, shebe at home, for she phoned me from the airport just five minutes ago.
| A．mustn't | B．needn't | C．can't | D．dared not |
The school was ______ in 1950 and has a history of nearly sixty years.
| A．set out | B．set up | C．set about | D．set off |
The family had lived ________ before, but the terrible traffic accident destroyed everything.
| A．in common | B．in danger |
| C．in place | D．in peace |
--- Would you please help me with the box?
--- ______ .
| A．Yes, please. | B．No, please don’t. |
| C．With pleasure. | D．My pleasure. |