—Could you tell me ?
—About two hours.
| A．how long it takes to fly to Guilin |
| B．how long it took to fly to Guilin |
| C．how long does it take to fly to Guilin |
| D．how long did it take to fly to Guilin |
—Could you tell me ?
—About two hours.
| A．how long it takes to fly to Guilin |
| B．how long it took to fly to Guilin |
| C．how long does it take to fly to Guilin |
| D．how long did it take to fly to Guilin |
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