选［D］。本题着重考查倒装句的用法。由于so involved放在了句首，句子用倒装形式。因为句子的时态是一般现在时，所以要借助于助动词do来构成倒装。把这句话改变成正常语序是：The children become so involved with their computers that leaders at summer computer camps often have to force them to break for sports and games(孩子们对他们的电脑如此着迷，以致于电脑令营的领导不得不经常强迫他们停下来，做做体育运动和游戏)。