下列节气或月份，地球公转速度最快的是（　　）

—I am really struck by your spoken English. You speak so fluently. Have you been abroad?

—Yes. I ______ in London for two years.

                                                                                                                                            春望    杜甫
                                                                                                         国破山河在，城春草木深。感时花溅泪，恨别鸟惊心。
                                                                                                         烽火连三月，家书抵万金。白头搔更短，浑欲不胜簪。