I ain't sure of what the question is exactly but I assume it has to go like this
"Have you left Hawaii before writting this letter?"
Answer:
Alexander expanded his empire, thus spreading
Greek culture.
Explanation:
Ms. Garcia was leading a tour of the gallery when the fire alarm sounded.
This is correct because it is the only sentence where the verbs match tenses.
Answer:
it's what they wanted to do
Explanation: