A：Hi，Peter，I hear that you've begun to stay in the school dormitory（学生宿舍）．（76） ______
B：Yes．It can save me a lot of time riding my bike to school．
A：（77） ______ What is the dormitory like？
B：It's OK，but not perfect．
A：Why？（78） ______
B：Today I overslept and missed my breakfast．
A：（79） ______
B：Yes．Some boys kept talking until midnight last night．So I couldn't fall asleep．
A：（80） ______
B：Wow，a good idea!Thank you．

A．How are you going to do that？ B．Is that so？ C．You overslept？ D．What was the matter？ E．I guess you can talk with them． F．Oh，I was sleeping at that time． G．That's really true．