题目

 如图，已知MB = ND，∠MBA = ∠NDC，下列条件中不能判定 △ABM≌△CDN的是（    ） A. ∠M = ∠N         B. AM∥CN        C. AB = CD           D. AM = CN   答案： D    —I expected him to be nervous before his speech, but he was as cool as a cucumber.     —He _______ it carefully. A. could have prepared      B. shouldn’t have prepared    C. must have prepared           D. can’t have prepared