Question

On Sundays there were a lot of children playing in the park, ____  parents seated together joking.

A．whose

B．their

C．which

D．where

Answer 1

B

解析试题分析：考查独立主格。句义：在星期天，有许多孩子在公园里玩，家长们坐在一起开着玩笑。把握逗号后的非谓语动词seated，这是关键词，由此确定是非谓语，而不是从句，所以A Ｃ　D都不对，所以B正确。
考点：考查独立主格。