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题目内容
（四川民族学院大学英语 B卷）
Passengers can begin to earn Miles_____.
A、if they reserve tickets at a hotel
B、if they buy tickets at the airport
C、before receiving the Permanent Card
D、after receiving the Permanent Card
A、if they reserve tickets at a hotel
B、if they buy tickets at the airport
C、before receiving the Permanent Card
D、after receiving the Permanent Card
参考答案