To our surprise,the stranger(  )to be an o

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To our surprise,the stranger(  )to be an old friend of my mother's.

A、turned out

B、set uD

C、set out

D、turned up

参考答案:

A

turn out意为“结果是,原来是”;turn up意为“找到,发现,出现,开大音量”;set out意为“开始,出发,陈述”;set up意为“设立,竖立,架起,升起,创(纪录),提出”。

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