单选题 There are many disadvantages in grouping pupils just according to their intellectual ability. In fact, bright children are rarely ______ by mixed-ability teaching.
A. held out B. held back C. held up D. held in

【正确答案】 B

【答案解析】[解析] hold back意思是prevent the development of“妨碍……的发展”；hold out“伸出；拿出：提出”；hold up在意思上相当于delay“耽搁；停止”；hold in“克制，抑制(感情)”。句意为：“仅仅按照学生的智力将他们分开教学有许多不利之处。事实上，将智力水平不同的学生混在一起教学，不会妨碍聪明学生的发展。”