=>

11) There were so many people in the hall that we couldn't see him.
=> There were such a lot of people in the hall that we couldn't see him.
12) The match was so exciting that all the fans shouted loudly.
=> It was such an exciting match that all the fans shouted loudly.
13) They drank so much coffee that they couldn't sleep all night.
=> They drunk such a lot of coffee that they couldn't sleep all night.
14) Alice had so many exercises to do that she couldn't go out.
=> Alice had such a lot of exercises to do that she couldn't go out.
15) The woman was so poor that she needed everyone's help.
=> She was too poor to be needed everyone's help.

11. There were such a lot of people in the hall that we couldn't...

12. It was such an exciting match that all the...

13. The drunk such a lot of coffee that...

14. Alice had such a lot of exercises to do that...

15. She was such a poor woman that she...