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
网友回答
A. should face
B. might face
(答案→)C. could have faced
D. must have faced
解析：考查虚拟语气。根据but后面句子中的didn’t说明本句是对过去的虚拟，故使用：情态动词+have done的形式，排除AB。D项不与虚拟语气连用。Could have done本可以做某事。句意：我们本可以一起面对困难，但是你为什么不告诉我呢？