answer: Meg isn't in the mood because she failed the examination. Her mom encourages her to set her aim from today.
documents: #Person1#: Morning, Mum!
  #Person2#: Morning, Meg. You look not well today? Are you ill?
  #Person1#: No, I am not ill.
  #Person2#: Then, What's the matter with you my child?
  #Person1#: Nothing.
  #Person2#: Oh, come on, baby. Tell me what happened.
  #Person1#: I. . . I failed to pass the examination. How I wish I had studied hard.
  #Person2#: Oh. Take it easy. You can set your aim from today.
  #Person1#: Ok, Mum. I will not fail the examination next time.