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
Once you enter the society ,you are mostly（）your own.

A．in
B．on
C．of
D．to
单项选择题
The camp meeting（）Catherine gave his first performance last summer was held for religious purpose.

A．where
B．which
C．that
D．who
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