What has he been doing all day?
He's been opening presents
What have you been doing all day?
I've been eating hamburgers.
What have you been doing all day?
I've been playing a piano
What has he been doing all day?
He's been relaxing.
What has she been doing all day?
she's been visiting relatives
What have you been doing all day?
I've been cleaning the house / doing housework
What has she been doing all day?
she's been singing
What have they been doing all day?
They've been doing exercises / sports / working out
What have you been doing all day?
I've been posing for pictures
What have you been doing all day?
I've been sleeping
What has she been doing all day?
hanging out with friends / talking with her friends
What have you been doing all day?
I've been sending text messages
What have you been doing all day?
I've been doing my homework / writing an essay
What has he been doing all day?
He's been dancing
What has she been doing all day?
she's been writing thank you cards
What has he been doing all day?
He's been recycling bottles and cans.