问题
选择题
A mistake ______ have been made on our bill. We didn’t order any fish today.
A．should
B．would
C．could
D．must
答案
答案：D
题目分析：考查情态动词。句意：我们的账单一定是出错了，我们没有要鱼。Should have done本应该；could have done本可以；must have done一定是。故选D。