'Today could have been a very happy day' is correct, but it suggests it wasn't a happy day for some reason. So, it would work best as a 3rd conditional sentence so that we know HOW the day could have been better, if something else had happened. For example - today could have been such a happy day, if the weather had been nice.

It's most common use is 'to leave', normally on some kind of journey. Tomorrow we need to set off by midday so that we are on-time for the flight, for example.

Of the many thousands of questions they could ask you for any given office job, I'd say the most common are... tell me about yourself.. Why do you want this job? Why do you want this work in this company? What would you do if....... (2nd conditional questions related to handling difficult scenarios), what relevant experience do you have for this position/post? What are your goals for the next five years? What is your biggest strength? What is your biggest weakness? If I were you I'd google the best way to answer these questions as there is specific information each question is looking for. I used to work in recruitment so I know these questions are very common. Book a class if you'd like to practice these questions :) Good luck!

hey! To kick back is an informal phrasal verb meaning to relax or take a break. It's most likely the person used to 'kick back' in this room, i.e. he used to relax in this room, but sleep and live in the other room. :D

'I was working' is the past continuous - we use this tense typically when we are storytelling or when we are talking about a specific time in the past, and often there is another action in the past simple that interrupts the action. E.g - Yesterday I was sleeping when the phone rang. 'I have been working' is the present perfect continuous which we typically use when we talk about an action which started in the past and continued until the present moment. E.g. You come home from work and see your husband looks tired. He has just been sleeping. 'hey darling how are you?' "I'm tired, I've been sleeping all afternoon". We also use the present perfect continuous when talking about an action which started in the past and continues into te present. For example "I've been painting the house all day and it's still not finished. I think it'll take another two hours to get the painting done." Hope this helps.

Hi! I'm back!

So, my life has changed a lot over the past two years. I've changed jobs twice and have moved to live in Crimea.