Molecule number 4 looks OK, but what is the double bond stereochemistry, cis or trans.
Molecule number 6, where is the aldehyde signal? It should be around 9.5. Also the signal at 3.9 is of a carbon directly attached to an oxygen atom, for example a methoxy. I think you will need to think again here.
Molecule 7, form the spectra it does not seem to have a carbonyl group in it. These signals are usually around 160-200 ppm in the 13C spectra.