问题
                    
What a terrible earthquake!—Yes. It came at about 6.30 this morning. I________ to the bus stop at that time.
                            A: wasbuilt
B:should bebuilt
C:has beenbuilt
D: is being built
                        
                        B:should bebuilt
C:has beenbuilt
D: is being built
正确答案是:
                        