Becuase america wanted him to come to the us
The prepositional phrase for this sentence is "go until Friday." The word "go" is a preposition. Think of it as a squirrel and a log. To find a preposition, say "The squirrel (went) [insert preposition] the log." If it makes sense, it is a preposition. Then just find the phrase to go along with it!
Answer:
Hi grandma,
Hope you are doing well. I just wanted to let you know that I will be going over to spend the next holiday with you. Can't wait to see you!
Love, your granddaughter/son
Explanation:
You could go with ‘The company has never been with the system until now.’