-- Are these _______ all from No. 2 Middle School? -- Yes. They often _________

题型：不详难度：来源：

-- Are these _______ all from No. 2 Middle School?
-- Yes. They often _________ their free time to help the old here.

A．volunteers; volunteers	B．volunteer; volunteers
C．volunteers; volunteer	D．volunteer; volunteer

答案

C

解析

试题分析：句意：这些志愿者都来自第二中学吗？是的。他们经常志愿把他们的空闲时间花在帮助这里的老人。前一空上的词是名词，后一空上的词是动词。所以选C。