单项选择题

Why did the workers file a suit against Wal-Mart

A．Because they were illegally hired by Wal-Mart.
B．Because they were illegally hired by contractors connected with Wal-Mart.
C．Because they were not treated fairly in terms of civil rights and wages:
D．Because they were illegally brought to America by Wal-Mart and its contractors.

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单项选择题

According to the author, the deeper problems of aviation industry ______.

A．are the effects of various disasters
B．are actually not fully recognized
C．are attracting a lot of attention
D．are not the real cause of airlines' bankruptcy

单项选择题

What does the author mean by Aviation has been incompletely deregulated, ( Para. 3)

A．Governmental restrictions are still imposed on aviation industry in many areas.
B．Governments help establish rules for aviation industry only in America and Europe.
C．Some countries hope to help their national carriers keep up their national prestige.
D．Many countries discourage merger plans between foreign and domestic carriers.