Question

David has been work__ for three years. Ed Ing?

Answer 1

Ответ:

ing

Объяснение:

Answer 2

It seems like you're trying to ask about David's work history, but the sentence is incomplete. To form a complete sentence, you can say:

"David has been working for three years."

If you want to ask about Ed's work history, you could say:

"How long has Ed been working?"