试题 试卷
题型：单选题 题类：常考题 难易度：普通
牛津版（深圳•广州）初中英语七年级上册Module 4 Fun time Unit 8 collecting things 综合复习
—It means that you can ________ the red button to set off the alarm when there is a fire.
—You'd better _______ the workers into two groups and ask them to take turns to work.
— I quite agree, but it_______ on when and how they walk.
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