Audrey Hepburn drawing,?

hmm, 7 or 8 to be honest-which I personally think is quite a good achievement. I think you need to work on her hands and toning. From the picture, your use of toning isn't very distinctive except for the neck area. You need to work on evenly and realistically depicting shade, try focusing on the source and areas where light hits and bounces off an three dimensional figure. Another thing would be her hair, to realistically depict her hair, I recommend you to use thinner strokes for a finer and more detailed finish, and again, I stress upon the importance of the reflection of light, for the hair, you must emphasise the curves and areas where the light bounces off the most i.e. the whitest part on the hair. You showed a lot of emphasis on the earring, making it the darkest part of the composition, this is not the focus of the picture, so try to darken the hair, work on shading, (especially the hands and nails) and perhaps finish drawing the ear as the earring looks like it is levitating off her face. I think this looks like an unfinished artwork, if you follow my advice I hope it may contribute to making it look as realistically close to the actual artwork or a finished piece at least. I do however believe you have great artistic potential, don't give up and keep working on improving, developing and practicing drawing! :)