A
If he ________ (be) younger, he _________(travel) more.
If he were younger, he would travel more.
If I _________(have)enough money, I _______(buy) a big house.
If I had enough money, I'd buy a big house.
If she ________ (pass) the exam, she _________ (be) able to enter university.
If she passed the exam, she would be able to enter university.
I __________ (marry) someone famous if I __________ (be) a movie star.
I would marry someone famous if I were a movie star.
If she ________(not believe) me, she _________ (tell) me.
If she didn't believe me, she would tell me.