Children in that kindergarten are sometimes asked to sit on their hands listening to the t

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(答案→)A. while
B. though
C. after
D. during
解析：考查引导词，while表示当…时候；though表示尽管…但是…；after表示在…之后；during表示在…期间。句子意思“那个幼儿园的小孩有时让孩子们坐在自己的手上当孩子们正在听老师讲课的时候”