there are some parents (send) their children to school.用sending 还是send啊?who省略

there are some parents (send) their children to school.用sending 还是send啊?who省略
there are some parents (send) their children to school.用sending 还是send啊?
who省略

there are some parents (send) their children to school.用sending 还是send啊?who省略
sending
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