英语 九年级 选择题 简单

重点词汇与固定搭配 — 英语选择题

人教版·英语(初中) Unit 6 When was it invented? AI 三重审校通过

题目
Mia discovered that a paper fan could cool her tea ___ while she was testing it without planning to. A. by accident B. take place C. in public D. at once