The boxer got ________ and fell down when his opponent gave him the final blow.
句意：这个拳击手踉踉跄跄，在对手给了最后一拳后倒下了。stagger蹒跚；犹豫。stamp铭记；标出。scatter分散，散开。shatter粉碎；打碎。因此，本题的正确答案为A。