have a test on a subject that the teacher didnt teach
Not necessarily. A piece of writing ends whenever a writer wants it to, but technically if he wanted to, he could work on it until he dies...he could perhaps even pass the work on to another writer before his death...and then that writer could again pass it on before his own death. A piece of writing can truly be infinite.
{When first thine earnest eyes with mine were crossed,} And love called love.
