Review the גמרא דף לו עמוד ב until דף לז. “ת”ש” (Eleven lines from top of the Amud)
Question:
Is חזרה only an issue on Shabbos or even on Friday?
Learn תוס’ “וב”ה until “וקשה לרשב”א
Question:
Why does the Gemara entertain the Mishna is missing words in order to establish the Mishna like חנניה?
Learn תוס’ דף לזה. “לעולם