单项选择题

It was two years ago ______ she went to teach in the mountains, and we have never seen her since then.

A．when
B．before
C．that
D．after
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单项选择题
Dr. Seaman would prefer the matter ______ at the next meeting.
A．to be discussed
B．being discussed
C．discussing
D．discussed
单项选择题
When I was a child, I ______ for a swim, if the weather was fine.
A．will go
B．was going
C．would go
D．had gone
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