Grammar Exercise: If only, I wish

Decide whether these statements express a "wish" or a "regret":

1. I wish I could fly. Wish Regret
   
2. If only she had seen the doctor earlier. He could have saved her. Wish Regret
   
3. If only I traveled to New York. Wish Regret
   
4. I wish I were a doctor. Wish Regret
   

Choose the correct answer:

1. Alice didn't get a good grade. She wishes she (work) worked had worked harder.
2. Tom likes football very much. He wishes he (become) became had become a professional football player.
3. He was running very fast when he had a heart attack. If only he (not/run) had not run didn't run so fast.
4. She's keen on computers. She wishes she (study) studied had studied computer science next school year.
5. I am sorry I don’t know how to use the computer. If only I (know) knew had known how to use it.
6. I stayed late at work and missed the last bus. I wish I (stay) did not stay had not stayed at work late