单选题 You ______ include this section. It's not necessary.
A. wouldn't B. couldn't C. don't need D. don't have to

【正确答案】 D
【答案解析】[解析] don't have to“不必”；如果用need，则应是you don't need to...(need是实义动词)，或you needn't include...(need是情态动词)。