Нужна помощь с англ яз

1. how much pupils in our group?
2. isn't book on the table?
3. how much old houses in your street?
4/ how much seasons in a year?
5. when be conference?
6. how much large cities in your country?
7. who was be in the room?
8. how much days in a week?
9/ what's in the shelf?
10. how much places of interest in London?
11/ where are many flovers?
12/ how much was work last week?

возможны ошибки... .