单项选择题

Never before _________ available for quick and easy acess in so many different fields of study.

A．so much free information were
B．has so much free information been
C．were so much free information
D．so much free information has been
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单项选择题
To sell the house , we made a __________ to the buyer by agreeing to put a new roof on it.
A．consideration
B．commission
C．concession
D．confirmation
单项选择题
____________ school policy , the students had a holiday between Chritmas and the New Year.
A．On behalf of
B．With regard to
C．In line with
D．In case of
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