单项选择题

Only when the CIA Director David Petraeus was forced to resign ______ that it’s hard to keep our e-mails secret.

A．we realized
B．realized we
C．did we realize
D．we did realize
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单项选择题
When the British singer Adele got a bleeding throat, the rumor ______ she would never sing again soon spread.
A．what
B．which
C．that
D．as
单项选择题
In Canada citizens, ______ their backgrounds, are free to keep and promote their cultural heritages.
A．regardless of
B．instead of
C．owing to
D．according to
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