Ответ:

b. I'll buy a new laptop If I can afford to.

c. I'll go travelling If I have enough money.

d. If I didn't waste so much money I  can save up for a new smartphone.

e. If I can speak Japanese I'll visit Tokyo.

f. If it is summer we haven't to study.

g. I'll study better If I have more time.

h. If I was an animal, I would be a cat

i. I would have spoken English fluently If I had lived in the USA.