for a few days the thirsty and hunger soldiers had to give in at last.A. Being surrounde

问题补充：

for a few days, the thirsty and hunger soldiers had to give in at last.

A. Being surrounded

B. Surrounding

C. Having been surrounded

D. Having surrounded

答案：

A. Being surrounded

B. Surrounding

(答案→)C. Having been surrounded

D. Having surrounded

解析：考查非谓语动词。句意：已经被包围了几天，这些饥渴的战士最后不得不投降了。现在分词表示主语正在进行的伴随性动作。如果分词动作发生在谓语动作之前则用完成时态的现在分词，主语战士是被包围的对象，故用被动语态，选C。