问题
选择题
______ 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
答案：C
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。