All of the sentences should be in type 2 . 1. i (travel) around the world if i (have) a lot of money. 2. if you (listen) to the teacher carefully , you (get) better marks. 3. if he (work) harder , he (be) richer. 4. if i (be) the richest man in the world , i (help) the poor. 5. i (write) to him if i (know) his address. 6. you (understand) it if you (read) it carefully. 7. they (give) you the job if you (wear) a suit. 8. i (do) it if i (know) how to. 9. if he boxer (be) more courageous , he (win) the match . 10. it (be) wonderful if your brother (be) here.

I would travel around the world if i had more money
if you listened  to the teacher carefully , you would get better marks
if he worked harder, he would be richer
if i were the richest man in the world , i would help the poor
i would write him if i knew his address
you would understand it if you read it carefully
they would give you the job if you wore a suit
i would do it if i knew how to
if the boxer was more courageous , he would win the match
it would be wonderful if your brother was here