Complete the sentences with WHOSE, WHO or WHOM as appropriate

Enter your answers in the gaps. When you have entered all the answers, click on the "Check" button.

E.g.A pacifist is a person who believes violence is wrong.
1This school is not only for children first language is French.
2I don't know the name of the person to I was speaking last night.
3The US president is the person lives in the White House.
4A widower is a man wife is dead.
5I know a couple are going to get married soon.
6I address this letter to it may concern.
7She meet a friend sister she went to school with.
8I don't know key this is.
9I don't know to this key belongs.
10I don't know this key belongs to.