On Sundays there are a lot of children playing in the park ______ parents seated together
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On Sundays there are a lot of children playing in the park, ______ parents seated together joking.
A．their
B．that
C．whose
D．which
请帮忙给出正确答案和分析，谢谢！
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正确答案：A
本题容易误选C，认为这是一个非限制性定语从句。解题关键是判断空格后的seated是不是谓语动词，seat“坐下”作动词时为及物动词后需接宾语，常用于seatoneself或sb．beseated，由此判断seated是过去分词，因此需用独立主格结构，表伴随状态，答案为A。