5 sentences - help with function and material!!

Hey.

I am Tobias, and I am new to this site. I study international corporate communications in Denmark, and as a class we have english grammar. I really hope you can be of help, since I will flunk this class if these sentences are wrong upon turning them in this friday. Yup, you guessed correctly - I am pretty desperate!

Sentence 1

All the people who were present in the room found the temperature too low to work effectively.
| S/Clause |V/VP| DO/NP |OC/Adjp| A/Advp |
|S/NP |SC/Clause |
|S/NP|v/vp|sc/adjp|S/pp |

Sentence 2

He appeared sad and lonesome so I found a seat close to him and we had a little chat.
|s/np|v/vp |sc/adjp|cc|sc/adjp |cc| S/Clause |cc | S/Clause |
|s/np|v/vp |do/np| oc/adjp |cc |s/np|v/vp|do/np |

Sentence 3

The purpose of the meeting we were having was to prepare and make plans for the party.
| S/Clause | v/vp |cc | v/vp | do/np |
| s/np | v/vp |do/clause |
|s/np| v/vp |

Sentence 4

I think I'm allergic to leather because I have a headache whenever I wake up wearing my shoes.

Sentence 5

Happy about his misfortune, she laughed and said: "This time I really got you where it hurts!"

- Sorry about the mix of capital letters, but it seemed the best choice due to the understanding.
Sentence 4 and 5 is where I am really stock, but I am not at all sure if the others are correct.

I really REALLY hope you guys can help, this is my last chance and the workload is extremely intense at the moment.

Kind regards

Tobias Lund