Answer:
When I was four years old, my dad and I planted a tree in our front yard.
Until I turned 18 years old, Dad and I measured it every year on my birthday.
Explanation:
In the first example, the verb to plant is used in the Past Simple Tense. It is because the action, that the girl is talking about, has happened in the past, and there is a time order when I was four years old. This is a finished action with a finish time word.
In the second example, the verb to measure is used in the Past Simple Tense. It is because the action is repeating in the past and there is an expression every year. This tense is used for that this repeated action is now completed and took a place in a specific time in the past.
