Who引导的宾语从句

1，I don't know who he is. 我不知道他是谁。

2，I don't know who you are. 我不知道你是谁。

3，It was a matter of who would take the position. 这是谁能胜任这职位的问题。

4，Since you have seen both fighters, who do you think will win? 既然你已经看到这两名选手，你认为谁会赢？

5，Tell me who you will go with? 告诉我你会跟谁在一起？

6，Do you know the man who is talking with your mother? 你知道跟你妈妈说话的人是谁吗？

7，He asked who could answer the question. 他问谁能回答这个问题？

8，Who is your teacher ,will try my best to help you with your study.谁是你的老师，我将会尽我最大能力去帮助你的学习。