题目

 He climbed silently ____ seizing the thief ____. 　A. in the purpose； by surprise 　　B. with purpose of； surprisingly 　C. with purpose of； surprisedly 　D. with the purpose of； by surprise 答案：D。with the purpose of是一个固定词组，意为“怀着……意图”；by surprise相当于suddenly。

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