switching off the lights. (the switch is small, white and made of plastic)
Take a photo with your smartphone.(A smartphone is small ,black and rectangular)
typing on a keyboard. (The keyboard is big , rectangular and black)
changing the channel with a remote control. ( thr remote is small, white and made of plastic)
Looking at your smartphone. (the smartphone is .......)
Putting on earphones. ( The earphones are small ,white and made of plastic)
Turning on the computer. ( the computer is small,square and made of plastic)
plugging in a phone charger. ( The charger is small ,white and made of plastic)
opening a plastic bottle.(The bottle is small,round and tranparent)
pulling the door handle.(The handle is round ,silver and made of metal)