What's he doing?
He's watching videos
What is he doing?
He's playing a game (playing games)
What's he doing?
He's surfing the Internet
To make objects, 3D printers using different ___ , such as plastic. (materials/program/plan)
materials
What's he doing?
He's checking email
What is he doing?
He's calling a friend
What is she doing?
She's taking a photo (taking photos)
What's he doing?
He's sitting in cafe
What are they doing?
They're chatting
This computer ___ allows people to check and organize their email. (program/machine/instructions)
program
What is she doing?
She's texting
What are they doing?
They're having lunch