Bob ... (eat up) all the muffins by lunchtime.
had eaten up
My sister ... (do) the laundry since early morning.
had been doing
They ... (decorate) the New Year tree before the children arrived.
had decorated
Olivia and Victor ... (chat) via Skype for an hour when the connection broke.
had been chatting
I knew that our parents ... (grow) melons in their greenhouse since they bought the house.
had been growing
The rain stopped but there were a lot of puddles because it ... (rain) cats and dogs.
had rained
Brown understood the problems of his agency because he ... (work) for it since 2005.
had been working
She ... (learn) “Eugene Onegin” by the autumn.
had learnt
Julia wanted to sit down as she ... (stand) at work all day long.
had been standing
He ... (loose) much weight by the end of the year.
had lost