单项选择题

Great changes______ place since he left here.

A．
[A] have been taken

B．
[B] have taken

C．
[C] were taken

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单项选择题
Henry ______be at home because he telephoned me from Paris just a moment ago.
A．
[A] needn't

B．
[B] isn't able to

C．
[C] can't
单项选择题
The lady has been asking her boss ______two days off since last week.
A．
[A] with

B．
[B] /

C．
[C] for
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