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
I was half way back to the cottage where my mother lived ______ Susan caught up with me.
A．before
B．where
C．when
D．that
单项选择题
Put on more clothes. You ______ be feeling cold with only a shirt on.
A．should
B．would
C．could
D．must
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