单项选择题
Several sand boxes need （）.
A. to repair and renew B. repairing and renewing C. repair and renew D. repaired and renewed
单项选择题 When a ship is abandoned, all of the crew members hearing the alarm sounding should put on （）.
单项选择题 （）the moving parts on the davit of the lifeboat.
单项选择题 If there is a fire in a hold, what should you do?（）
