—Hello, can I speak to Mr. Smith?
—I’m sorry, but it is 3 weeks _____ he worked here.
| A．before | B．since | C．after | D．while |
相关试题
The way the guests ___ in the hotel influenced their evaluation of the service.
| A．treated |
| B．were treated |
| C．would treat |
| D．would be treated |
Scientists have many theories about how the universe ___ into being.
| A．came | B．was coming |
| C．had come | D．would come |
She'll never forget her stay thereshe found her son who had gone missing two years before.
| A． | that | B． | which | C． | where | D． | when |
My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive . 
| A．as | B．so | C．too | D．very |
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