1.
A: I have been trying to contact you all week.
B: Sorry. I've just returned from a trip to Sweden.
2.
A: Sarah has been practicing that piano piece for days.
B: Yes. She has an important concert next week.
3.
A: I have been reading a book called "The Moneyless Man" all week.
B: I heard that the author has been living without money since 2008.
4.
A: Mark has been working so hard, he's completely exhausted.
B: Oh, that's why he hasn't been playing football for a while.