单项选择 较易0.85 引用1 组卷138
See _________ your invention works as it is planed. If not, do more research, redesign it.
| A．since | B．after | C．until | D．if |
20-21九年级上·全国·单元测试
类题推荐
See _________ your invention works as it is planed. If not, do more research, redesign it.
| A．since | B．after | C．until | D．if |
You should search for some information and learn more about the rules ________ you visit the Science Museum.
| A．until | B．before | C．while | D．after |
—Mum, why are you so unhappy?
—I drove ________ the street when the traffic light is red on my way home. A ticket is on the way.
—I drove ________ the street when the traffic light is red on my way home. A ticket is on the way.
| A．before | B．after | C．across | D．through |
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