I
1. The man who drove the car was nervous.
2. He didn't wait at the traffic lights, which were red.
3. The restaurant that she works (in) is very expensive.
4. She is visiting someone who was once a professional dancer.
5. What's the name of the river which/that goes through the town?
6. She always asks me questions that are difficult to answer.
7. I have a friend who is very good at repairing cars.
II
1. The man who is wearing a blue jumper is in the garden. ( = The mas who is in the garden is wearing a blue jumper)
2. The girl who works in the bank is from India.
3. My sister, who lives in Australia, has three childred.
4. The waiter who was wearing a blue shirt was rude.