Students _________ be careful when they do chemical experiments in the lab. A. can B. may C. need D....
2022-10-03 08:06:52 184次 上海市松江区2019届九年级上学期期中考试英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
Students _________ be careful when they do chemical experiments in the lab.
A. can B. may C. need D. must
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