单项选择题

A．services
B．products
C．newspapers
D．dictionaries
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单项选择题
A．oftenB．usuallyC．occasionallyD．randomly
A．often
B．usually
C．occasionally
D．randomly
单项选择题
A．anyoneB．no oneC．someoneD．everyone
A．anyone
B．no one
C．someone
D．everyone
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