1 you were opening
You opened
2 it was eating
It ate
3 I understood
4 she was crying
She cried
5 they were copying
They copied
Hey. Hey. How are you? - Excellent. How was your vacation. -It was a wonderful day. I went to his uncle in the Crimea. -And what did you do there. - What, what. Went to sea decorate the tree. What do you usually celebrated at home? - No. I went to Germany. It's cool. There are such beautiful boys. - Class. Then tell me, the lesson began. - Ok.
Her и His и нам не подходят, потому что это фактически альтернатива "их" и "ее", только для англичан.
You и They - тоже не подходят, потому что тогда бы у нас было бы are. (You - это и ты в очень уважительной форме, и вы в смыслe обращение к группе от 2 человек, и там, и там говорится во множественном)
Остается She.