On Sundays there were a lot of children playing in the park, parents were sittin
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On Sundays there were a lot of children playing in the park, _______ parents were sitting together joking.
A. their B. whose
C. which D. that
试题答案
B
whose parents were sitting together joking 为非限制性定语从句，因为句中有完整的谓语 were sitting。