如果新同学来了，请让ta坐在第三排。

When the new student arrives, ask ___them to sit in the third row.

当每位乘客到达时，我们请ta填写表格。

When each passenger arrives, we ask ___them to fill in a form.

如果有人需要帮助，请向ta提供支持。

If someone needs help, please offer ___them support.