—I saw your mother in the library just now. —It ______ be her. She went to Beijing yesterday. A. can...
2022-11-14 08:15:05 85次 新目标（Go for it）版英语九年级Unit 8 It must belong to Carla单元测试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—I saw your mother in the library just now.
—It ______ be her. She went to Beijing yesterday.
A. can't B. mustn't
C. needn't D. must
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