单项选择题
检查救生衣和个人物品。()
A. Check your life-jackets and belongings. B. The cable is leading straight ahead. C. I have given it a thorough clean. D. Steer the wheel carefully and pay attention to keeping a sharp lookout.
单项选择题 准备放艇。()
单项选择题 在集合地点集合。()
单项选择题 救生艇下水每隔三个月进行一次。()