I _______ (pump) up three tyres. Would you like to do the fourth?
have pumped
I __________ (look) for mushrooms but I ______ (not find) any.
have been looking / haven't found
_________ (you / hear) the news? Tom and Ann are engaged! ~ That's not new; I _______ (know) it for ages!
Have you heard / have known
I __________ (try) to finish this letter for the last half-hour.
have been trying
It ____________ (rain) for two hours and the ground is too wet to play on, so the match has been postponed.
has been raining
