单项选择题

Questions 11-13 are based on the following passage about the transportation in the future.
What will passengers be asked to do when they travel to the moon

A．Carry little luggage.
B．Go through a health check.
C．Arrive 10 minutes earlier for boarding.
D．Undergo security check.

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单项选择题

单项选择题

Questions 11-13 are based on the following passage about the transportation in the future. What will passengers be asked to do when they travel to the moon 您的浏览器不支持 audio 元素。