Find the odd one in each set of words and word-combinations 1) to skip classes, to miss classes, to attend classes, to play truant;
2) lecture, textbook, seminar, tutorial;
3) student membership cards, school living certificate, student record books, library cards;
4) to be good at, to cope with, to keep up with the group, to lag behind;
5) junior, senior, graduate, sophomore, monitor.
