The car is running _ since it had a service.

Correct answer: A. more smoothly

  • A. more smoothly
  • B. much smoothly
  • C. many smoothly
  • D. smoothly

Explanation

The correct answer is A. more smoothly.The sentence should read: "The car is running more smoothly since it had a service."The comparative form "more smoothly" indicates that the car's performance has improved since its service, implying a comparison with its previous state.

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