单项选择题

______ for aches, pains and fever, aspirin is now the subject of multiple investigations of its role in treating many more serious complaints.

A．Long used
B．Being used long
C．Having been long used
D．It has long been used
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单项选择题
Honsewives who do not go out to work often feel they are not working to their full ______.
A．capacity
B．faculty
C．strength
D．content
单项选择题
It was ______ that the restaurant discriminated against black customers.
A．addicted
B．alleged
C．assaulted
D．ascribed
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