Following comment of Tim in http://moodle.org/mod/forum/discuss.php?d=54574#251590 about the webct interface related to the status of questions (graded or not).
joseph Rézeau :Agreed, the WebCT interface for quizzes was just what we need.
Joseph
Tim: So would I.
Are you interested in developping this idea following my suggestion (or in another way) in the same discussion?
http://www.chimie.uqam.ca/images/2809/statusexample.jpg.
adding after line 516 of attemp.php
with the simple following code (line 516 )

    echo "<table><tr><td>Questions submitted and graded:";
    $nn= 0;
            foreach ($questions as $i => $question) {
                $nn++;
         if ( $states[$i]->grade > 0 || $states[$i]->sumpenalty > 0 )
        echo $nn .' <input type="checkbox" name="qgradestate" value="" CHECKED ></td><td>' ;
        else echo $nn .' <input type="checkbox" name="qgradestate" value="" UNCHECKED ></td><td>' ;
        }
    echo "</td></tr></table>";