题目内容：

①Tom,you are late again.This time I _______listen to any of your excuses.(prepare)这一次我可不准备再听你的任何借口.
②重度污染后,现在才来保护河流已经有点太晚了.
_____________,it may be a bit too late to protect river.(suffer)
请说明怎么填和原因!