汉语拼音的Xiao long bao作主语时谓语动词为什么用复数

3 汉语拼音的Xiao long bao作主语时谓语动词为什么用复数

Nanxiang aside, the best Xiao long bao have a fine skin, allowing them to be lifted out of the steamer basket without tearing or spilling any of their contents. The meat should be fresh with a touch of sweetness, and the surrounding soup hot, clear and delicious.

上面一段摘自2023年新高考全国卷1的语法填空。

请教专家老师，汉语拼音的Xiao long bao作主语时谓语动词为什么用复数？