单项选择题

Their products are frequently overpriced and ______ in quality.

A．influential
B．inferior
C．superior
D．subordinate
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单项选择题
It was from Stephen ______ she first heard of the man referred to as a specialist.
A．whom
B．who
C．that
D．when
单项选择题
Don't ______ this news to the public until we give you the go-ahead.
A．release
B．relieve
C．relate
D．retain
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