Ответ:

3 Match.

1-f If Paul were a famous pop star, he would travel around the world.

2-c If I found a wallet in the street, I would take it to the police.

3-e If Jane saw an alien, she would take a picture of him.

4-d If I could visit any planet, I would visit Venus.

5-b If Helen spoke Chinese, she would understand her friend Chan.

6-a If my parents didn't have a car, they would use public transport.