What does smh mean? 80 point

What is a casting director, and what do you think might be some of the possible benefits of a director using a casting director? what do you think might be some of the possible drawbacks of a director using a casting director? your response should be at least five sentences. use complete sentences and offer evidence to back up your opinion.

How to combine the two sentences in bold.

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.