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1. Don’t (扔掉) these materials. They can be recycled.

2. These buildings were (拆毁)last week.

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   Going to a new school might be hard —you not only have to make new friends,but also have to search an unknown place that is usually large and totally strange to you. Most schools invite seniors to help newcomers. But wouldn’t it be more fun if the campus guide was not a human but a drone (无人驾驶飞机) ?Let's welcome SkyCall.

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