Grammar. So/such(a); so much/so many

1. The restaurants were _____ expensive that we never ate out.

2. I'm exhausted. It's been _____ long journey.

3.There are ______ options that you won't know which one to choose.

4. З якими частинами мови вживається such/such a?

5. З якими іменниками вживаємо so many/so much