单项选择题
A. set out B. set off C. get off D. cut off
The fire drill is （）. You are dismissed.A.finishB.finis...
单项选择题The fire drill is （）. You are dismissed.
A.finish B.finished C.begin D.beginning
Lower the （）ladder.A.embarkB.embarkationC.disembarkD.B+...
单项选择题Lower the （）ladder.
A.embark B.embarkation C.disembark D.B+C
The boat is （）to the water surface.A.downB.topC.lowerD....
单项选择题The boat is （）to the water surface.
A.down B.top C.lower D.up
