Join the sentences using who, which, that, whose or where. 1. UNICEF is an organisation. It helps take care of the health and education of children around the world. 2. Mrs Sanders lives on the third floor. Her son is a gadget freak. 3. Mr Henderson is my employer. He was on the news last night. 4. Toronto is a beautiful city. My cousin lives there. 5. You've met my aunt. She makes amazing pasta dishes. 6. Twitter is used by many people nowadays. It is an online social networking service.