Question

We saw many students playing on the playground, most of them _____ girls.

A．are

B．being

C．were

D．have been

Answer 1

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。