A.
1. if it rain, we will staying at home 
2. if you don't know the way, i'll pick you up 
3. my mum bake a cake if you will coming to see use
4. they will coming to his party if he invite them 
5. i will visiting my grandparents if i have a long holiday
B.
1. if you studied harder, you would got better marka in your tests. 
2. if i been rich, i would traveled around the world. 
3. she would came to the market with us if she had not to work 
4. we would sent you a message if we got to the city 
5. i would called you back if i arrived at home.