Of course, it should be possible, but people have been saying that since the days of Moodle 1.6, so don't get your hopes up.
Lesson
Accesing the question bank from within the lesson module
ការពិភាក្សាត្រូវបានបិទ ដូច្នេះអ្នកមិនអាចឆ្លើយតបទៀតទេ។