问题
选择题
Five minutes earlier, and we______the last bus.
A．had caught
B．should have caught
C．could have caught
D．caught
答案
答案：C
题目分析：句意：再早五分钟,我们就赶上最后一趟地铁了。根据句意可知事实上没能赶上。Five minutes earlier,是隐含的虚拟条件句，相当于：If we had arrived five minutes，主句用could have done表示“过去本可能做却没有”，should have done “过去本应该做却没做”，选C。