The skating marathon has been going for five hours.改为同义句 The skating marathon_________five hours__________.
问题描述：
The skating marathon has been going for five hours.改为同义句 The skating marathon_________five hours__________.
答
这道题的正确答案是：
The skating marathon (started 或 began) five hours (ago).
滑冰马拉松五小时前开始的.