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Answer:
It reveals that Macbeth is a man who will allow no one to get in the way of his goals. Macbeth is overly ambitious and is ready to destroy to get his dark desires.
It would be was and was because he is singular. I'm not sure about complete or completes, but I think it would be complete.
The answer is the last one, which is "Transforming disaster into opportunity-did you hear what happened?- has made him a hero". As you can see transforming disaster into opportunity has made him a hero is a sentence by itself. "Did you hear what happened?" Is just extra info that goes between dashes.