7. He's such a _____ actor - he always makes me laugh! a cool b funny c useful

The adjective that does NOT fit in sentence 7 is c useful.

Explanation: The sentence states that the actor makes people laugh, implying he is humorous. 'Cool' and 'funny' are adjectives that describe a comedian or a humorous actor. 'Useful' is not a relevant adjective for an actor's performance in this context.

Answer: c useful