Adjective or adverb? Choose the correct answer.

1.  I'm dead sure.

• 'Dead' is an adverb here.
• 'Dead' is an adjective here.

2. The door was wide open.

• 'Wide' is an adverb here.
• 'Wide' is an adjective here.

3. He drove too fast.

• 'Fast' is an adverb here.
• 'Fast' is an adjective here.