用所给单词的适当形式填空

attempt, scholar, value, belief, shadow, convince, possession

The children were having fun, running after each other’s ___.
Einstein never ___ what any others had said until he proved it himself.
The prisoners made several ___ to run away, but failed every time.
In china, citizens are not allowed ___ a gun.
The public call for a return to traditional ___ in education, such as firm discipline.
Despite the objection, he was ___ that he was right.
George won a ___ to study at university.