Ответ:

Ex. 3

Объяснение:

A: My back hurts.

B: That's because you have been working all day.

A: I know. But at least I have finished with the gardening.

A: You look tired. What have you been doing?

B: I have been playing tennis with Evita.

A: Oh yes. I have seen her play before. She is good, is not she?

B: Yes, she is. She has beat me five times since the start of summer.