单项选择题

A．
B．
C．
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单项选择题
A．Li Ping.B．Wang Gang.C．Zhang Wei.
A．Li Ping.
B．Wang Gang.
C．Zhang Wei.
单项选择题
The children _______ before they work in the Restaurant.
A．must be trained
B．must be over seven years old
C．should know how to read and write
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