Nie wiem czy te zdania napisalem prawidłowo. Tam gdzie nie jestem pewien wpisalem w nawiasach. Co by lepiej pasowało. Moglibyście je sprawdzić?
How much does those jeans, please?
There wasn't (tutaj much traffic albo any police) on the motorway today.
Where is my pen? I'm sure I left it here, but it's (gone away, dissapeared).
Have you been here for a long time? No, I (have just) arrived.
Just relax and (stop worrying) about the exams. You'll pass easily.