options: m : i finished 40 minutes earlier than the original time . m : i used 20 more minutes to finish the exam . m : i was allowed ten minutes more to finish the exam . actually , we were given only 1.5 hour . m : yes , i spent only one hour and 40 minutes .
article: f : oh , i heard you had a math exam yesterday . how much time did you have for the exam ? m : well , we were allowed 2 hours , but i finished it 20 minutes ahead of the time . f : wow , you are excellent .