Can someone please help me

What is the best way to combine these sentences?

When i was four years old, my dad and i a tree in our front yard. it was a tiny, fragile sapling. he promised me that it would grow tall and strong, but he said that i had to be patient. until i turned 18 years old, dad and i it every year on my birthday. choose the words that correctly fill in the blanks.

Correct sentence. when her brother boarded the ship bound for america, christina stood on the pier and tearfully waved goodbye.