我的姐姐不能找到这是谁的笔,于是把它交给了老师的翻译：My sister couldn't find who this is, so take it to the teacher 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

My sister who can not find the pen, then put it to the teacher

My sister couldn't find who this is, so take it to the teacher

Whose pen can't my elder sister find this is, therefore has given it teacher

My sister who is not able to find it in the pen is handed it to the teacher

My sister couldn't find who this is, so take it to the teacher