单项选择题
The urgency signal concerning the illness of persons on board ship is（）.
A.Mayday
B.Pan
C.Securite
D.Attention
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There are no other vessels in the vicinity（）those at anchor.
A.besides
B.including
C.apart from
D.in addition to -
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There is plenty of（）at this area.
A.a room
B.room
C.rooms
D.the room -
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There is sufficient anchorage for（）at all time around the No.1 buoy and for smaller vessels around the No.4 buoy.
A.deep laded vessels
B.deeply load vessels
C.deep loading vessels
D.deeply loaded vessels
