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?   - общий2. 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

Это : нужно поставить глаголы в нужное время.  1. when morning came, the storm already (to stop), but the snow still (to fall).  2. yesterday by eight o’clock he (to finish) all his homework.  3. when i (to come) to his place at nine, he (to read).  4. i (to wait) for permission to go abroad for already three weeks, but i (not to receive) the visa yet.  5. everybody (to be) at the door of the museum, but my friend (not yet to come).  1. when morning came, the storm already stopped, but the snow still falling.  2. yesterday by eight o’clock he finished all his homework.  3. when i came to his place at nine, he was reading.  4. i am waiting for permission to go abroad for already three weeks, but i did not receive the visa yet.  5. everybody is at the door of the museum, but my friend doesn’t come yet.