A.SoundB.RingC.ReleaseD.B+C（）(拉响) the alarm immediately……

单项选择题The ship is （）(搁浅).

A.strand
B.stranding
C.stand
D.standing

单项选择题The air is （）(有毒的).

A.humid
B.damp
C.toxic
D.mould

单项选择题Close all fire doors and use the （）（干粉灭火器）.

A. dry powder extinguisher
B. foam extinguisher
C. CO₂ extinguisher
D. portable extinguisher

单项选择题The signals that will be used for emergency should be clearly （）（列出）.

A. put out
B. set out
C. set on
D. put on

单项选择题It may be （）（补充）by individual cards issued to each member of the crew.

A.supply
B.supplemented
C.supplied
D.supplies