Question

【题目】On Sundays there were a lot of children playing in the park, __ parents seated together joking.

A. whose B. their

C. which D. that

Answer 1

【答案】B

【解析】考查独立主格结构。句意：星期天有很多孩子在公园玩，他们的家长坐在一起开玩笑。因为前面有逗号，而且没有连词，说明后半句不能是一个完整的句子，不是非限制性定语从句，而是独立主格结构，用their表示a lot of children的所有格。故选B。