It ________ be the postman at the door. It's only six o'clock. A. mustn't B. can't C. won't D. needn...
2022-09-04 05:29:26 32次 北京市2018-2019学年高二上学期期末考试英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It ________ be the postman at the door. It's only six o'clock.
A. mustn't B. can't
C. won't D. needn't
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