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1·But we've never met with any experience of a guest sneaking out without paying his bill or a situation where the guest is unable to pay his bill or refuses to pay his bill.

但是我们从未有过客人没有付钱就溜走或者不能付钱，或拒绝付钱的经历。

2·A guest paying full fare can invite another guest to join the tour at half price.

一个付足费用的顾客可以邀请另一个顾客以一半费用参加本次旅行。

3·A guest paying full fare can invite another guest to join the tour at half price.

A支付全额费用的客人，每位可以再带一位客人参加旅游，按半价付费。