留神脚下！抓住扶手。（）
- A、Watch your feet! Get hold on the rails.
- B、Watch your step! Get hold of the rails.
- C、Watch your step! Get hold to the rails.
- D、Mind your head! Get hold of the rails.
正确答案:B
答案解析:有
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留神脚下！抓住扶手。（）
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