单项选择题
We have been told that under no circumstances ______ the telephone in the office for personal affairs.
A．may we use
B．we may use
C．we could use
D．did we use
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单项选择题
Over the last fifteen years, running has become a popular ______ for 30 million participants of all ages.
A．fantasy
B．pastime
C．symposium
D．penalty
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单项选择题
As a teenager, Mary sent newspapers in the morning, worked in a restaurant in the afternoon, and ______ in the evening.
A．typing for her mother
B．had typed for her mother
C．typed for her mother
D．to type for her mother
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