问题补充:
We the difficulty together, but why didn’t you tell me?
A. should face
B. might face
C. could have faced
D. must have faced
答案:
A. should face
B. might face
(答案→)C. could have faced
D. must have faced
解析:虚拟语气考点,对过去的虚拟,本能……。根据下文的didn’t说明是对过去情况的说明,使用“情态动词+have done”;could have done本可以做某事,实际上却未做;must have done一定做了某事(是对过去所发生情况的有把握的肯定推测);句意:我们本可以一起面对困难,但是你为什么不告诉我?故C正确。