单项选择题

Great changes______ place since he left here.

A．have been taken
B．have taken
C．were taken
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单项选择题
The lady has been asking her boss ______two days off since last week.
A．with
B．/
C．for
单项选择题
The cake will as soon ______as possible.
A．finish making
B．be finished making
C．finish to make
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