单项选择题

All the key words in the article are printed in ______ type so as to attract readers' attention.

A．dark
B．dense
C．bracket
D．bold
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单项选择题
His nationality isn't ______ to whether he is a good lawyer.
A．concerning
B．dependent
C．connecting
D．relevant
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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