[单选题]Alice: Hi, Sam! It's nice to see you here.
Sam. Hi. Alice!
Alice: _____（56）
Sam: To my dorm.
Alice: Great! Could you take this book to Peter?
Sam: _____（57）Does Peter know what it is for?
Alice: Yes. _____（58）
Sam: _____（59）Are you well prepared for it?
Alice: _____（60）See you tomorrow!
Sam: See you!
57._____.