We use the Present Perfect Continuous to talk
about actions that began in the past and are still
taking place with emphasis on duration
I've been watching TV since 6 pm.
(I'm still watching TV now.)
They've been sleeping for hours.
(They're still sleeping at the moment.)
How long have you been studying?
Since the morning/For five hours.​

All pupils think about their future. It is very important to find a good job because career plays a great role in our life. 
As for me, I want to become a businessman. Nowadays this profession is in demand. Good businessman must be very responsible, honest and have decision-making skills. Businessmen get a lot of money so they need to know how to manage it. Besides, all businessmen are famous persons that is why their behavior and actions must be worthy.
все ученики задумываются о своей будущей профессии. очень важно найти хорошую работу, потому что карьера играет важную роль в нашей жизни.
что касается меня, то я хочу стать бизнесменом. в наши дни эта профессия очень востребована. хороший бизнесмен должен быть ответственным, честным и иметь навыки принятия решений. бизнесмены получают огромные деньги, поэтому они должны уметь ими распоряжаться. кроме того, все бизнесмены-знаменитые люди, поэтому их поведение и поступки должны быть достойными. 

you sit in the waiting room, trying to get some sleep and your neighbor sings. thing you possible ways to make it stop. you ask him to shut up and obsnyaete you want to get some sleep. but he does not listen to you. you start coughing loudly, publish some sounds to prevent him singing. for a while it stops, but then starts to sing again. You are away for a while, see what else besides the two of you do not have at the reception, you quietly suffocate him some cloth body extract from the building in a trash bag, and return safely asleep.