单项选择题

According to Mr. Bacon, people keep snakes because ______.

A．they like them as pets
B．they are curious of them
C．they use them to frighten other people
D．they keep them to do research
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单项选择题
What was Tom doing in February
A．He was on a field trip.
B．He was vacationing in Florida.
C．He was studying most of the time.
D．He was vacationing at home.
单项选择题
Howard is probably ______.
A．an orchestra conductor
B．a music fan
C．a sales manager in a music company
D．a background music composer
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