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。