A.finishB.finishedC.beginD.beginningThe fire drill is （……

单项选择题Lower the （）ladder.

A.embark
B.embarkation
C.disembark
D.B+C

单项选择题The boat is （）to the water surface.

A.down
B.top
C.lower
D.up

单项选择题Ready for （）the boat.

A.lower
B.lowering
C.lowered
D.topped

单项选择题We are going to carry out an emergency （）.

A.practise
B.practice
C.drill
D.drills

单项选择题Throw a （）to the person overboard and help him come on board.

A.lifeboat
B.life-raft
C.lifebuoy
D.fire mask