That is how I roll

what circumstance would we use this sentence“That is how I roll”

My holiday！ Today is the first day of my holiday about May day！I wake up at 7：40am.Why do i get up so early because maybe i can get a part-time job in this day。My roommate with i go to eat breakfast and then take a phone to the people in charge.But he said he was sleep,if arrive the storehouse he will call our.Oh,my god,what time it is! sleep. Now, it is 8:30am！We all know he will get up at 10:00am."Now where we go and what can we do？”My roommate ask me."how about go to hospital,"So we go to hospital see the doctor and then we hand out in the street and some store！When at 11:00 the charge tell my roommate said today only need 1 people to work，so i said to my friend“you do and i go back to hostel."So sad,all my roommate are go to work and i nothing do but sit in front of computer！

Why i want to be good at English？ I am an university student，i have study English 7 years，so long！but，i cann't understand other people speak English！i can not stand it，so，i i want be good at English that i can watch the movies，talk with people who speak English.