— a volunteer is great.
—I think so. Some of us want volunteers for the London Olympics.
A. Being; being
B. To be; being
C. Being; to be
D. To be; to be
网友回答
A. Being; being
B. To be; being
(答案→)C. Being; to be
D. To be; to be
解析：句意：作为一个志愿者太伟大了。——我也这么认为。我们中的一些人想成为伦敦奥运会的志愿者。动名词做主语表示抽象动作，不定式做宾语表示具体的将要进行的动作，结合语境可知选C。