will it take us to fly to Hainan and will the trip to Hainan cost us?
| A．How much, how long | B．How long, how much |
| C．How much, how much | D．How long, how long |
will it take us to fly to Hainan and will the trip to Hainan cost us?
| A．How much, how long | B．How long, how much |
| C．How much, how much | D．How long, how long |
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