单项选择题

Man can speak because ________.

A． he has a brain
B． he has a head
C． he has a mouth
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单项选择题
Scientists are beginning to understand that men are different from animals because ________.
A． they can think and learn
B． they can speak
C． they can use computers
单项选择题
The doctor tried his best and saved the woman.
A． Right.
B． Wrong.
C． Doesn't say.
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