The machine will start to work when you ________ the red button(按钮)． A. take off B. put up C. push d...
2022-10-15 06:13:24 171次 2018年秋冀教版九年级上学期英语单元测试试卷：Unit 5 综合测试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
The machine will start to work when you ________ the red button(按钮)．
A. take off B. put up C. push down D. look down
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