Решите быстрее !1.If they (to know) the significance of this event, they would be more alarmed. 2. If her son (to be born) two years earlier, he wouldn’t haVe had to do military service.
3. If you (to look) everywhere for your passport, you will find it.
4. If Joe (to get up) earlier, he would get to institute on time.
5. If the fire (not to happen), their house wouldn’t have been destroyed. '
6. If the sound (not to be) so loud, she wouldn’ t be so nervous.

Thank you for your letter.i am glad that you are fine. i wish you success in studies at hogwarts. (следующие предложение не правильное , мне смысл не понятен ,что вы хотели сказать ? )in my school there are 142 stairs which always lead to different destibations on friday and these stairs disappearing (vanishing) steps half way up(through)in our school, such as(like) hogwarts there are such subjects as   history of magic and transfiguration, also in our school there are teachers -ghosts.in hogwarts there are many different subjects, but my favourite ine is maths  , because i enjoy myself doing calculations, solve problems and drawing  shapes. we have got algebra & geometry separately.during our algebra lessons we count quite a lot and solve different tasks.but it is different from our geometry classes we draw shapes (for instance-enlargements, translation or transformation of shapes) as well as prove theorems. well, i will be better go now because i have to help my mum. i am waiting for a reply at your earliest convenience( i am looking forward to receive letter from u) love(best wishes)