单项选择题

I know it has gone past but I just can't help______ about it.

A．to think
B．thinking
C．thought
D．to be thought
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单项选择题
He demanded that we explain what was happening,
A．hadn't we
B．didn't we
C．hadn't he
D．didn't he
单项选择题
So badly ______ in the accident that he had to rest for a few days at home.
A．did he wound
B．he was wounded
C．he wounded
D．was he wounded
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