单项选择题

The price of crude oil futures in New York ______.

A．dropped by 6%
B．dropped by 42 dollars
C．rose by 60%
D．rose .by 42 dollars
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单项选择题
According to Mr. Bacon, people keep snakes because ______.
A．they like them as pets
B．they like them although they don’t have them as pets
C．they use them to frighten other people
D．they are keen on snake meat
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