【题目】We ______the difficulty together, but why didn't you call me?
A.should face
B.might face
C.must have faced
D.might have faced

【答案】D
【解析】句意：我们本可以一起面对困难,但是为什么你不给我打电话? 根据why didn't you call me?中的过去时可知本书是对过去情况进行虚拟,故D正确. must have done一定做了某事；might have done本可以做,实际上却未做；结合句意可知D正确.