Lee is going to reserve an air ticket to Paris. But he is not sure about the return date. So what kind of ticket would you suggest him to book? (5.0分)

Lee is going to reserve an air ticket to Paris. But he is not sure about the return date. So what kind of ticket would you suggest him to book? (5.0分)

A、Return ticket

B、One-way ticket

C、Open ticket

D、Round-trip ticket

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