Fill in: why, who, whose, where, which, when.
1. A person _____________ works with animals should be patient.
2. They take care of the eight big black ravens ____________ live in the tower.
3. That’s the boy ________________ mum works in a bank.
4. This is the house ________________ I was born.
5. The reason ______________ she went is still a mystery.
6. 2014 was the year __________ the Olympic Games were held in Sochi.