ПОМАГИТЕ ПЛИИИИЗЗЗЗЗ ПРЯМ СРОЧНО НУЖНО

I was having lunch while my mum was washing dishes Have you finished your homework yet? They have never travelled abroad Jeff was watching a documentary on tv at 7 o'clock yesterday evening Diane bought a new computer two months ago I was tidying my room when the lights suddenly went off Gary has already cooked dinner Did she walk to school yesterday? Mike has just come home from work