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

A.turned upB.set up

C.set outD.turned out

D


解析:

句意:令我們驚奇的是,那個(gè)陌生人結(jié)果卻是我母親的一位老朋友。turn up“調(diào)高,露面”;set up“建立,豎起”;set out“出發(fā),動(dòng)身”;turn out“證明是,結(jié)果是”。故選D項(xiàng)。

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