Впредложении i find the problem of ozone because there may be health problems надо на месте пропуска писать worry или worrying, и почему

Будет-worry.
Перевод--я нахожу проблему озонового беспокойства, потому что могут быть проблемы со здоровьем.

1.Shoes are made in this factory.
2. Was he bitten by a dog?
3. B: Steve couldn`t read and write until he was seven.
4. B: couldn`t
5. B: got (хотя по-моему, здесь не должно быть время из-за незаконченного периода времени - this morning)))
6. They usually go to the river for a swim. 
She usually goes to class at 8 o'clock. 
Mr. Brown doesn`t usually buy expensive books. 
Does she have (drink) coffee after lunch? 
What do you have (drink) after dinner? 
7. B: He’s from Germany. 
8. B: were
9. D: When did they arrive?
10. C: I was watching TV …

1.There is a sentense on the blackboard.-there are sentences on the blackboard(s).
2.Is there a desk in the room?-are there desks in the room(s)?
3.There is not any book on the table.there are not any books on the table(s).
4.Is there a dictionary on the chair ?are there dictionaries on the chair(s)?
5.There is a match in the box.there are matches in the box(es).
6.There is a girl in the picture.there are girls in the picture(s).
7.There is no child in their family.there are no children in their family(ies).