单项选择题

67（）

A．by
B．in
C．for
D．with

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单项选择题
66（）

A．However
B．Therefore
C．Furthermore
D．Nevertheless
单项选择题
______ the fact that his initial experiments had failed, Prof. White persisted in his research.
A．In spite of
B．Because of
C．As to
D．In view of
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