1. a)Was Nature the source of people since ancient times? -Общий вопросb)When was Nature the source of people?- Спец.вопрос.c)Was Nature the source of people since ancient times or in our times?- Альтернативный вопрос.d)Since ancient times Nature was the source of people,wasn't it?- Разделительный вопрос.2.а)Did people live in harmony with environment?b)What did people live in harmony with?c)Did people live in harmony with environment or they pollute it?d)People lived in harmony with environment,didn't they?