Відповідь:

- That's the jumper (which/that) my mum bought for me.

- He lives in a flat which/that is on the second floor.

- Mr Smith, who is 30 years old, is a firefighter.

- This is the newspaper (which/that) I bought yesterday.

- This is Helen, who teaches us French.

- That's Jason, whose father is a doctor.

- She works for a company that makes hats.

- That's Antony, whose car broke down yesterday.

- I met a woman who knows you.

- The police have caught the men who robbed the bank.