.—____ when has the country been open to international trade?
—1978, I suppose.
| A．Since | B．In | C．From | D．After |
相关试题
Rome was not built in a day. You should set ______ goals and work hard to achieve them.
| A．alternative | B．considerable | C．subjective | D．realistic |
the zoologists tried to prove was that the photo of the South China Tiger had been staged or technologically dealt with.
| A．That | B．Why | C．Whether | D．What |
---How often do you visit your granny in the village?
---I feel ashamed. .
| A．Very often | B．By accident |
| C．Just once in a while | D．All of  a sudden |
After a second thought, Jean a better method to deal with the problem.
| A．put up with | B．came up with | C．added up to | D．made up for |
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