Pour chacune des phrases suivantes, trouver la question portant sur l'élément noté en gras.
They've been watching series all day.
He's been working on a new case.
I've been sending emails to the whole family.
She's been writing her diary.
They've been travelling for a month.
I've been helping you because I like you.
He's been cooking for three hours.
She's been hanging out with Mark.
He's been listening to the same song all afternoon.
She's been showering for half an hour.