To our surprise，the stranger ______ to be an old friend of my mother's.
A．turned upB．set up
C．set outD．turned out
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
句意：令我们惊奇的是，那个陌生人结果却是我母亲的一位老朋友。turn up“调高，露面”；set up“建立，竖起”；set out“出发，动身”；turn out“证明是，结果是”。故选D项。