单项选择题

Teachers need to be aware of the emotional, intellectual, and physical changes that young adults experience. And they also need to give serious 16 to how they can best 17 to such changes. Growing bodies need movement and 18 , but not just in ways that emphasize competition. 19 they are adjusting to their new bodies and a whole host of new intellectual and emotional challenges, teenagers are especially self-conscious and need the 20 that comes from achieving success and 21 that their accomplishments are 22 by others. However, the typical teenage lifestyle is already filled with so much 23 that it would be wise to plan activities in which there are more winners than losers, 24 , publishing newsletters with many student-written book reviews, 25 student artwork, and sponsoring book discussion clubs. A variety of small clubs can provide 26 opportunities for leader-ship, as well as for practice in successful individual dynamics. Making friends is extremely important to teenagers, and many shy students need the 27 of some kind of organization with a supportive adult 28 visible in the background. In these activities, it is important to remember that the young teens have 29 attention spans. A variety of activities should be organized 30 participants can remain active as long as they want and then go on to 31 else without feeling guilty and without letting the other participants 32 . This does not mean that adults must accept irresponsibility. 33 they can help students acquire a sense of commitment by 34 for roles that are within their 35 and their attention spans and by shaping clearly stated rules.

A.capability
B.responsibility
C.proficiency
D.efficiency