A                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

题目分析：此题考查的是学生对两次世界大战中重大事件的掌握，较基础。首先把四件事分出属于哪次战争。“④凡尔登战役”属于第一次世界大战，应该排在第一位。而ABCD四个选项中，④排在第一位只有A。故确定答案A。这是一种简便快捷的答题方法。

另一张就是把这些事件发生的时间写出来，然后排出先后顺序。