put the verbs into the correct form ( for Conditional 1

Put the verbs into the correct form ( for Conditional 1 )
1.if I ......( go back ) to the shop on Saturday , I .....( take )
2.I ......( not go ) to the party if you ....... ( not come )
3.if everyone .... ( help ) we .... ( finish ) cooking more quickly
4.if the phone ....( ring ) I .... ( not answer ) it
5...... (you pay) for the coffee if I .......( buy ) the cakes ?
6.Pete ..... (buy ) vegetables if he .... ( can ) choose the film
7.If we ....... ( not hurry) we .... ( miss )the first part of chef
8. If we ... ( tell ) them the truth , they ......(not believe ) us