So involved with computers that the leaders at the summer computer camps often had to for

So involved with computers that the leaders at the summer computer camps often had to force them to break for sports．
A. has the children become
B. did the children become
C. has become the children
D. became the children

A. has the children become(答案→)B. did the children becomeC. has become the childrenD. became the children解析：句意：孩子们是如此迷恋电脑，以至于夏日电脑营的营长们常常强迫他们停止电脑游戏去运动。首先是要用倒装句，so ....that（如此……以致……）结构中so在句首，后面的句子要用部分倒装，其次是时态，根据“had to”可知用一般过去时，说话时children仍然是迷恋电脑的状态，不能用完成时。选B。

我也是这个答案