单项选择题

I felt somewhat disappointed and was about to leave,______something occurred which attracted my attention.

A. unless
B. until
C. when
D. while
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单项选择题
As a newly retired chairman, he is not used______to like that.
A. to being spoken
B. to speak
C. being spoken
D. to speaking
单项选择题
They______blind men, how could they see the elephants
A. were
B. had been
C. having been
D. being
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