For thousands of years comets have been a mystery to a man. Stephen Hawking

is a theoretical physicist. к двум предложениям задать к каждому по 5 вопросов (общий, специальный, альтернативный, вопрос к подлежащему, разделительный)

1. Have comets been a mystery to a man for thousands of years? - общий

2. How long have comets been a mystery to a man? - специальный

3. Have comets been a mystery to a man for thousands of years or for hundreeds of years? - альтернативный

4. What has been a mystery to a man for thousands of years? - к подлежащему

5. For thousands of years comets have been a mystery to a man, haven't they? - разделительный

1. Is Stephen Hawking a theoretical physicist?

2. What is Stephen Hawking?

3. Is Stephen Hawking a theoretical physicist or a practical physicist?

4. Who is a theoretical physicist?

5. Stephen Hawking is a theoretical physicist, isn't it? - разделительный