We the difficulty together but why didn’t you tell me?A. should faceB. might faceC. could

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：考查情态动词。本题考查对过去事情推测，故用情态动词 + have done，could have done本可以做，must have done过去一定做。句意：我们本可以一起克服困难的，但你为什么不告诉我呢？故C正确。