Why did the man want to go to Africa?

W: You’re leaving Brighton! But why? What are you going to do?
M: I’m going to Africa. I’ve got a job as a doctor with a medical team.
W: What ! You’ re joking !
M: No, I am not kidding, Rosie. I’m going to miss you very much and I don’t want to end our friendship.

M: Hi, Julia. Are you dreaming?
W: No, I’ m thinking about evening classes.
M: Evening classes? Why?
W: Because I’m going to study computers. I cannot be a good secretary if I cannot use computer well enough.