單項選擇題To prevent a wooden hull from leaking you caulk it（）.

A.after drydocking，while the hull is moist
B.after drydocking，and the hull has dried
C.afloat，where it is leaking
D.afloat，in all accessible areas


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1.單項選擇題To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.

A.the actual depth
B.added to or subtracted from the charted depth
C.multiplied by the charted depth
D.divided by the charted depth

4.單項選擇題There is plenty of（）at this area.

A.a room
B.room
C.rooms
D.the room

5.單項選擇題There is not（）depth of water around the area centered at the lighthouse.

A.ample
B.sufficient
C.enormous
D.incredible