单项选择题

Some component parts should be replaced regularly because （）

A．they are outdated
B．they need to be oiled
C．they become worn out
D．they are easily available

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单项选择题

Which of the following statements is TRUE according to the passage（）

A．All the members enjoy equal benefits
B．Ivory is the starting membership level.
C．Fliers can choose any membership level.
D．VIP rooms are only for the Platinum level.

单项选择题

To make their miles count, members must （）

A．pay their membership fees regularly
B．fly overseas at least once every year
C．take a domestic flight with Air France once a month
D．pay for their flight at least once within twenty months