What are people in China supposed ________ when they meet for the first time? A. to do B. do C. doin...
2022-10-16 06:47:49 182次 人教九年级第十单元测试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
What are people in China supposed ________ when they meet for the first time?
A. to do B. do
C. doing D. to be done
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