单项选择题

According to the passage, where did diamonds first come into existence

A．In the volcanoes.
B．On the floor of the sea.
C．Under the river bed.
D．At the foot of the mountains.
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单项选择题
What do you think is the best title for this passage
A．How Is Diamond Formed And Found.
B．Diamond--A Precious Stone.
C．Diamond Hunting.
D．Diamond-Producing Countries.
单项选择题
What kind of neighborhood did the woman live as a child
A．An affluent one.
B．A poor one.
C．A suburban one.
D．A rural one.
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