问题
选择题
On Sundays there were a lot of children playing in the park, _______ parents sat together joking.
A．their
B．whose
C．which
D．that
答案
B。
whose parents sat together joking 为非限制性定语从句，因为句中有完整的谓语 sat。
搜题请搜索小程序“爱下问搜题”