---It must be John who is in the office. --- I’m sure it ________be John. I saw him off at the airpo...
2022-10-03 04:59:28 99次 山东省青岛市城阳区2018届九年级第一学期期末英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
---It must be John who is in the office.
--- I’m sure it ________be John. I saw him off at the airport just twenty minutes ago.
A. won’t B. can’t C. mustn’t D. needn’t
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