"Who", "whom", and "that" all can serve as relative pronouns and can be used to introduce clauses that give additional information about whatever they refer to. Thus all the possibilities in #1 are correct. In #2, "that" and "which" are both grammatically correct but you should probably only use "which" in a situation where a selection (among) houses is referenced. For example: "Jim owns three houses. Two of them were given to him and he bought one of them. The first house he acquired is the one which he bought."

Hello Zoe, to answer your question, no the pronoun 'that' cannot be used here because it is a relative pronoun that begins a relative clause. for example: 'The little boy, that was swimming in the lake, is my son.' I hope this helps

1. He was the most interesting person (that) I have ever met. - optional 2. The person who stole my money, please confess. 3. To whom does this belong?

you can always use which, where and others wh instead of that and vice versa

Hi, If anybody wants to practice English, I can be your partner.