In pairs, person one greets person two. Person two has trouble understanding everything that person one says and asks for clarification twice or three times. Example:
1: Hi Yolanda! How are you?
2: I'm sorry, what did you say?
1: I said, "How are you?"
2: I'm sorry I don't understand.
1: How are you feeling?
2: Oh, fine. Thank you. How are you?
1: Fine.
2: What?
1: I said I am fine.
2: I'm sorry, I don't understand...
Do for a short time, two minutes or so, then switch roles.