Concept:Take away the time for the first question and share the rest equally among the other questions.Solution:Total time =2 hours =120 minutes.Time left after the first question =120−20=100 minutes.Other questions =9−1=8.Time for each =8100=12.5 minutes.Key point: Change hours to minutes first, and divide by 8, not 9.Answer:Option D (12.5 minutes)