Isaw them ten minutes ago, so they must have gone/ can't have gone far

I saw them ten minutes ago, so they can't have gone far.

1)    You have to be calm and confident;

2)    You shouldn’t worry because even if you don’t succeed there are a lot of other job offers;

3)    You have to tell about all work areas you are good at;

4)    Don’t forget to mention your previous work experience;

5)    You have to tell about your past achievements;

6)    You have to be careful while explaining why you have decided to leave your current job;

7)    It’s important to tell about the references you have;

8)    You must wear suitable clothes;

9)    You mustn’t be late for your job interview;

10) You must be very polite and attentive.

My room is very large and bright. There are two windows, bookcase, wardrobe, table, sofa, chair and of course warm bed. On the floor is white carpet. Also you can see many different pictures on the walls: my fotoes and pictures that are drawn by me. How had I said before, I have got a table where I usually do my homework. I have got no flowers, because of there isnt much light in our flat, so plants cant grow. To sum up-I like my room and enjoy every minute that I spend there. Но единственное что, здесь употребляются сложные конструкции и времена, поэтому если ты в 1-3 классе, тебе не поверят, что текст сочинил ты. Так что лучше некоторые моменты переписать попроще