- You seem familiar with Mr. John?
-Of course, we_______ together for three years in the 1990s.
| A．have worked | B．were working |
| C．are working | D．worked |
- You seem familiar with Mr. John?
-Of course, we_______ together for three years in the 1990s.
| A．have worked | B．were working |
| C．are working | D．worked |
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