问题
选择题
We saw many students playing on the playground, most of them _____ girls.
A.are
B.being
C.were
D.have been
答案
答案:B
考查独立主格结构。句意:我们看到很多学生在操场上玩,他们中大部分是女生。most of them _____ girls.前缺少连词,可知下文为独立主格结构。现在分词短语表示正在进行的伴随性动作,结合语境可知选B。