—Have they come here________？
—Yes，they have come here________．
| A．yet；yet |
| B．already；already |
| C．yet；already |
| D．already；yet |
—Have they come here________？
—Yes，they have come here________．
| A．yet；yet |
| B．already；already |
| C．yet；already |
| D．already；yet |
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