They ________ stand at the gate and welcome the guests because the robots can do that. A.mustn’t B.s...
2022-06-21 17:02:21 57次 山东省菏泽市2018-2019学年九年级下学期学科竞赛英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
They ________ stand at the gate and welcome the guests because the robots can do that.
A.mustn’t B.shouldn’t C.needn’t D.can’t
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