--Hello, Max. How has you been these last days? 
--Hey, very well, and you? 
--Oh, I've been studying all time since I saw you last month. 
--That's good! Then, you haven't had any amusement, don't you? 
--Sure! I've decided to spent all my time studying. I want to improve the most my qualifications. 
--Go on, then! 
--Tell me, have you seen David these days? 
--No, I haven't, but he has worked double time the last weeks. 
--So, he has returned home very tired and hasn´t contacted anyone of his friend. I understand him. 
--Well, my friend I must go 
-- Bye. If you see David, tell him to phone me. 
--OK, bye.