1.the first person to get in the car is a chicken
2.the first in the list is Juan
3.first you need to do your homework
4.Your are first in the race are one of the first person whoever talked to me 
6.You are the first person to tell me happy birthday
7.You should do the laundry but first eat
8.First do your homework and then you can watch tv
9.I was here first
10.Im the first person ever to climb mount everest

Espero que esto te haya ayudado