Inversion after negative expressions and 'only...'

1-Only after my friends got their home, did I figure out that I had baked some cookies for them.

2- After looking for him everywhere, did i find his head under the bed

3- Not until the year 2067 will i earn more than $480000

4- Such is her enthusiasm for winning the race, that she is going crazy

5- So amazing was his presentation, that the audience asked him for his autograph

6-On no account will students get a seven in the text

7- Not only did I visit Narnia, but I also went to Howards last year

8- Not until he gets me a dog, will I have talked him again

9- Not any expression did he demonstrate

10- Little do they recieve in return

11- Hardly had I bought a new phone, when I lost it in the cafeteria