阅读下面对话，掌握其大意，并根据所给首字母的提示，在横线上写出一个英语单词的完整、正确形式，使对话通顺。

Marie：Jerry，is today Tuesday the fifth，or am I（76）m                   ?

Jerry：I'm not（77）q                sure，either．Let me have a look．Oh，I am afraid you're mistaken．Marie．It's Tuesday the seventh．

Marie：Oh，my God! I hope this afternoon Miss Defoe will stay at the（78）t             office．I must tell her that I'm going to give up my biology．Do you think the teacher will（79）a                            me to do so?

Jerry：But why are you stopping biology? You're（80）f                 of it, aren't you?

Marie：Yes，but I've（81）m                   too many classes because of my part-time job．I'm so far（82）b                everyone and maybe I will（83）f            the exam．So it's better for me to give it up this term．

Jerry：That's a（84）S                      ．

Marie：Yeah，but（85）l                   biology is only a course for us to choose this term．I hope I can start again next year．