Решение:
Заполняем пропуски глаголами в форме Present Continuous.
- Joe: Hi Bob. We're meeting (meet) outside the shopping centre. Where are you?
Bob: I'm sitting (sit) on the bus. Where are you? - Joe: Outside the shopping centre. Ian and (wait) for you now.
Bob: OK. There's a lot of traffic. The bus isn't going (not go) very fast. - Joe: Well, we aren't staying (not stay) here a long time. It's cold! Where's the bus now?
Bob: It's coming (come) into Mill Street, so see you in two minutes.