单项选择题

A．They may crash because of nature disasters or human faults.
B．The world’’s weather conditions are getting worse.
C．The airport safety inspections are getting worse.
D．Airplanes are often overloaded nowadays.
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单项选择题
A．A box.B．A young tree.C．A book.D．Apples.
A．A box.
B．A young tree.
C．A book.
D．Apples.
单项选择题
A．Because he wanted to steal a violin and take it out with him.B．Because he was planning to commit a crime.C．Because he was going to earn money by playing his violin in the street.D．Because he was going to return home.
A．Because he wanted to steal a violin and take it out with him.
B．Because he was planning to commit a crime.
C．Because he was going to earn money by playing his violin in the street.
D．Because he was going to return home.
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