Объяснение:

1)My favorite piece of technology is computer.Because I can use computer for speaking languages.And at the weekend I sometimes play computer games on computer.

2)Usually I use computer for do my homework.And sometimes I can play computer games on computer.And I can use a computer for deliver a pizza.

3) Computers.And they're stay in the computer studies subject room.And my teacher sometimes says:You can play computer games on computer until you do classwork on computer.