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
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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
单项选择题
______ the problems are numerous, we must still try to solve them.
A．In spite of
B．Although
C．In order that
D．Since
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