【单选题】He was taken away by the police. He _______ for a thief.
A．must mistake
B．must be mistaken
C．must have been taken
D．must have mistaken
【单选题】He was taken away by the police. He _______ for a thief.
A．must mistake
B．must be mistaken
C．must have been taken
D．must have mistaken
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