单项选择题

All flights ______ because of the terrible weather, they had to go there by train.

A．having been canceled
B．had been canceled
C．having canceled
D．were canceled
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单项选择题
Despite almost universal______ of the vital importance of women’’s literacy, education remains a dream for far many women in far too many countries of the world.
A．identification
B．compliment
C．confession
D．acknowledgement
单项选择题
These are signs ______ restaurants are becoming more popular with families.
A．that
B．which
C．in which
D．whose
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