单项选择题

______ are the days when teachers were looked down upon.

A．Gone
B．Go
C．To go
D．Going
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单项选择题
He hurried out of the classroom ______ the class was over.
A．a moment ago
B．the moment
C．at the moment
D．the moment when
单项选择题
In Disneyland, every year, some 800, 000 plants are replaced because Disney refused to ______ signs asking his guests not to step on them.
A．take down
B．call for
C．put up
D．set up
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