单选题 The policeman said that I______ leave my car in the street.
A. can't B. needn't C. couldn't

【正确答案】 C
【答案解析】考查情态动词以及间接引语的用法。needn't表示为“不必”；can't couldn't表示为“不能”，根据句意，正确答案应该是过去时的couldn't，即C。