[解析]
(1)C.细节理解题.根据最后一段的句子Now,unlike the coaches of my youth,this man was interested in how he did off the court.He always made sure I kept up with my studies and was able to be trusted.,可知布莱恩教练与作者小时候的教练不同,他对学生在赛场之外的表现感兴趣.他总要保证作者在你学习中水平达标.故选C.
(2)D.词义猜测题.根据第四段的句子In the first two years I slacked off,not putting forth my full potential.,可知作者前两年懈怠,没有发挥全部的潜能.slacked off,是"没有努力"的意思.故选D.
(3)A.推理判断题.根据全文,布莱恩教练不仅在篮球训练中严格要求队员,还在训练之外的学习中关心学生,期待他们在班级表现优秀.故布莱恩教练是严格的、有帮助的(strict and helpful).所以选A.