Complete the dialogue.then read it.Mum:Hello,dear!

Mum: Hello, Dear!
Son: Hello, mum! What`s for dinner?
Mum: Unfortunately, I didn`t have time to prepare anything. But we can order the pizza you don`t mind.
Son: Well, it is great idea...
Mum: Why are you so upset (sad)?
Son: I must confess that I got a bad mark in exam today. I am so sorry. 
Mum: Oh, Geremy! Getting good marks is not the most important thing in our life. Don`t worry about it.
Son: But what should I do now? That mark was so important for my grades in the certificate!
Mum: You can ask him for passing that exam once more. But don`t be nervous about it if you don`t want to get a sickness.
Son: Yes, you are right. Thank you for helping me, mum.