Choose the correct answer. 1 this is the skate park which/where i skate regularly. 2 that's the girl who/whose mum works in a bank. 3 arthur conan doyle was the author which/who created sherlock holmes. 4 2003 was the year when/which they visited the usa.

1 This is the skate park where I skate regularly.
2 That's the girl whose mum works in a bank.
3 Arthur Conan Doyle was the author who created Sherlock Holmes.
4 2003 was the year when they visited the USA.