单项选择题

A．Iron from old ships.
B．The bones and teeth of whales.
C．Wood found floating in the ocean.
D．Seashells of unusual shapes and colors.
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单项选择题
A．People all over the world.B．Two billion people.C．Two and a half million people.D．Half the people in the world.
A．People all over the world.
B．Two billion people.
C．Two and a half million people.
D．Half the people in the world.
单项选择题
A．New-born babies have no preference as to which hand to use.B．Scientists believe that man’s right-handedness derived from our animal ancestors.C．There are more right-handed monkeys than left-handed ones.D．Why most people are right-handed is still a mystery to man.
A．New-born babies have no preference as to which hand to use.
B．Scientists believe that man’s right-handedness derived from our animal ancestors.
C．There are more right-handed monkeys than left-handed ones.
D．Why most people are right-handed is still a mystery to man.
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