单项选择题
A. Remember: safety first. B. Mind. Safe the first. C. Think of it. Safety is one. D. Think of it. Safety first.
留神脚下！抓住扶手。（）A. Watch your feet! Get hold on the rails.B...
单项选择题留神脚下！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.
引航员正在下口令。 （）A. The captain is giving orders.B. The pilo...
单项选择题引航员正在下口令。 （）
A. The captain is giving orders. B. The pilot is giving orders. C. The quartermaster is giving orders. D. The pilot is given orders.
小心碰头！（）A. Mind your head.B. Watch your head.C. Watch yo...
单项选择题小心碰头！（）
A. Mind your head. B. Watch your head. C. Watch your step. D. Watch your walking.
