题目

下列做法中，不利于青春期发育的是(    )A.在日常生活中注意青春期保健       B.同学聚会时用吸烟喝酒助兴C.积极参加体育活动，提高身体素质   D.男女同学正常交往，建立真诚友谊  答案：B解析:略 Mary didn’t want ________ of the two kinds and asked the shop assistant to show her ________.A.both; the otherB.all; the othersC.either; anotherD.neither; another