Children,please help ______(you) to some oranges.

yourselves

孩子们，请自己随便吃些橘子吧

help yourself to 随便吃，

不知道怎么说，总之就是叫他们随便吃，不要客气的意思。

正确答案应该是yourselves
Children,please help yourselves to some oranges.

填yourselves
意思是：孩子们，请自己拿些橘子吃。

yourselves~孩子们随便吃些橘子吧~help oneself~是自用的意思~

your