单项选择题

______ the 18th century ______ man realized that the whole of the brain was involved in the working of the mind.

A．It was not until, that
B．It is not until, when
C．It is not until, then
D．It was until, that
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单项选择题
At last, we found ourselves in a pleasant park with trees providing shade and ______ down to eat our picnic lunch.
A．having sat
B．sitting
C．to sit
D．sat
单项选择题
The Reform Committee proposed that wages ______.
A．would have been raised
B．would be raised
C．be raised
D．were raised
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