Исправьте ошибки. 1. i moved to the city since three years ago. 2. they have discussing the problem for two hours. 3. oleg can't speak to you now. he hadn't finished his lunch yet. 4. nina is working since 9 o'clock. 5. i have been working in the garden for 10 o'clock.

1. I moved to the city three years ago.
2. They have been discussing the problem for two hours.
3. Oleg can't speak to you now. He hasn't finished his lunch yet.
4. Nina has been working since 9 o'clock.
5. I have been working in the garden for 10 hours.