The underlined term (flies) used verb+es which is used to describe the verb that still being doned regularly.
If the verb is currently being done , the verb will use-ing , if it's a plan in the future, we will see 'will' before the verb and the verb will not use -es
hope this helps
Subject: "Each of the staff members"
Verb: "take a training course in the new software."
Answer:
Its okay to replace an government when they aren't really doing anything.
Then airport is considered a noun
