1. Мы обсудили очень важные вопросы сегодня.
We didn't discussed very important questions today.
Did they discussed very important questions today?
2. Они купили новую машину.
They haven't bought a new car.
Have they bought a new car?
3. Я часто заказываю фруктовый салат на десерт.
I don't often order for dessert a fruit salad.
Do you often order for dessert a fruit salad.
4. Я сейчас читаю очень интересную книгу.
I'm not reading a very interesting book at the moment.
Are you reading a very interesting book at the moment?