Make up a dialogue.Act it out. На картинке как покупатель ...

Viktor

Assistant:Can I help you?

Customer: Yes,I'm looking for a blue jumper.

Assistant:What size are you?(e.g. large? small? medium? 14? 16?)

Customer:Where's the changing room?

Assistant: It's down there on the right.

Customer:Yes, I'll take this one.Excuse me. Where will l pay for these?

Assistant:Over at the cash desk.

Customer:And can I pay by credit card?

Assistant:Of course.

Customer:Thank you.goodbye!

Assistant:you are welcome!