book for reading assignment;
a book hard to identify/ is missing;
2) 教授和学生关系:学生问老师问题;学生寻求老师的帮助;学生询问老师对作业的意见;老师要求学生对论文打印错误等
work as one's teaching assistant;
may I ask you a few questions;
come in one's office hours;
finish reading one's research report;
read some papers he recommended;
correct all the typing errors in a paper;
check the paper for typing errors
3) 同学之间交流:选课;听课感受;对老师讲课的评价;提供老师论文复印件;交流论文写作进展;交流如何读书;考试通过互相祝贺;对生病同学补课;认识新同学;为打印论文而向对方询问如何找纸;谈论学习进展等
the topic is interesting;
each present a different theory;
read more than one article;
get a full mark in math exams;
on the first day of school;
find quality paper to type essay;
have one's hands full with;
well worth the time and trouble;
take five classes next semester;
too many courses offered to students