【题目】The lady ________ have done something wrong, because she is looking guilty.
A.wouldB.shouldC.canD.must
在线课程【答案】D
【解析】
试题 句意：这个女士一定做了错事，因为她看起来很内疚。表示肯定推测用“must have done”，would have done“本来会做”，can have done“本可以做却没有做”，should have done过去本应该做却没有，所以选D。