单项选择题

A．She has to have worked in a hospital once.
B．She has to have some experience of hotel work.
C．She has to know foreign languages.
D．She has to know how to fly a plane.
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单项选择题
A．When they are on holidays.B．On Sunday mornings.C．On Saturday night.D．As soon as they have information.
A．When they are on holidays.
B．On Sunday mornings.
C．On Saturday night.
D．As soon as they have information.
单项选择题
A．They visit a recycling center.B．They clean a neighborhood park.C．They collect trash.D．They collect newspapers.
A．They visit a recycling center.
B．They clean a neighborhood park.
C．They collect trash.
D．They collect newspapers.
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