题文
We are roommates for 3 years and never once __________ .
| A．we have quarreled | B．have we quarreled |
| C．do we quarrel | D．did we quarrel |
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We are roommates for 3 years and never once __________ .
| A．we have quarreled | B．have we quarreled |
| C．do we quarrel | D．did we quarrel |
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