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单选题
When they check in at an airport, Club members should show _____.
A
their boarding pass.
B
their membership card
C
a photocopy of the ticket
D
an application form
参考答案
参考解析
解析：
文中第四段第一句提到“Please show your membership card in at an airport”，请在机场出示会员卡，故B选项为正确选项。
文中第四段第一句提到“Please show your membership card in at an airport”，请在机场出示会员卡，故B选项为正确选项。
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