Задайте 5 вопросов (спец, общ, альтр, хвостик, общ): bob had to go to dentist

Bob had to go to dentist.
1 Did Bob have to go to dentist?
2 Did Bob have to go to dentist or to vet?
3 Who had to go to dentist?
4 Bob had to go to dentist, didn't he?
5 Whom did Bob have to go to?

Archimedes. Why in the first place was the ancient Greek scientist? First of all, because he is one of the greatest mathematicians of all times, close he came to the calculation of the number of "PI". Today all students and students of the daily study and enjoy the discoveries of the Greek. Also Archimedes was famous for the invention of many useful machines. Among these are the siege guns, and mirrors, поджигающие sails on the Roman ships by focusing sunlight. Archimedes made the first theorist of mechanics. For example, he presented the complete theory of the lever, applying it in practice. Also, scientists have developed a Archimedes screw (screw), with the help of which вычерпывается water and the present day. The primacy of the inventor of merit - all of it was opened more than two thousand years ago, when there were no computers, no technology available today, the inventors. Archimedes, perhaps, he studied in the libraries of Alexandria, but most of his knowledge was acquired independently.

1. If you had brought me the book, I should have read it. 2. If he didn't ring me up, I woudn't come. 3. If he hadn't written to me, I shouldn't have answered him. 4. I wish I had a tie to match my suit. 5. The doctor suggested that she had a long rest in the Crimea. 6. If I had been you, I should have appologised to her. 7. You wouldn't have so many accidents if you drove slowly. 8. If he were in, he would answer the phone. 9. If you had passed your examination, we should have a celebtarion. 
10. What might happen if I pressed the button? 11. I should not have taken your umbrella if I had known that it was the only one you had. 12. If he knew it was dangerous he wouldn't come. 13. I shouldn't have gone there if I had been you. 14. He would have been the best pupil in the class if he had worked harder. 15. We would have stayed at home if we had known he was comung. 16. He might have understood everything if you had spoken not so fast.