Traduire en français une phrase contenant SOTraduction

Quelle est la traduction française de chacun des dialogues suivants ?

- They bought a new car.
- So did I.

- I will do my homework tomorrow.
- So will we.

- She has lost her keys.
- So have I.

- They are trying to fix their computer.
- So am I.

- Our train leaves in five minutes.
- So does mine.