单项选择题

A．They lived in caves.
B．They traveled in groups.
C．They had an advanced language.
D．They ate mostly fruit.
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单项选择题
A．Discuss the situation with the person in charge of the dormitory.B．Ask her roommate not to make so much noise.C．Go to bed after midnight.D．Send a letter to the residents.
A．Discuss the situation with the person in charge of the dormitory.
B．Ask her roommate not to make so much noise.
C．Go to bed after midnight.
D．Send a letter to the residents.
单项选择题
A．500 millionB．600 millionC．700 millionD．800 million
A．500 million
B．600 million
C．700 million
D．800 million
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