单项选择题

AIDS is said the number-one killer of both men and women over the past few years in that region.

A．being
B．to be
C．to have been
D．having been
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单项选择题
I left my pen on the desk and now it’s gone; who it
A．took
B．has taken
C．will take
D．had taken
单项选择题
__________ for the fact that she broke her leg, she might have passed the exam.
A．Had it not been
B．Hadn’t it been
C．Was it not
D．Were it not
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