— How far is it from Tianjin to Changsha？
— It is a _______ flight from Tianjin to Changsha.
| A．2-hour-long | B．2-hours-long |
| C．2 hours’ long | D．2 hour long |
— How far is it from Tianjin to Changsha？
— It is a _______ flight from Tianjin to Changsha.
| A．2-hour-long | B．2-hours-long |
| C．2 hours’ long | D．2 hour long |
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