A.AtB.OnC.OfD.In（）the time of collision，the 3rd officer……

单项选择题（）the ship leaves at 1000 today，she can arrive there tomorrow.

A.When
B.How
C.If
D.Should

单项选择题（）the packing is the same，the lots are different in marks.

A.For
B.Since
C.Because
D.Although

单项选择题（）the morning from 0800 to 1200 Chief Officer is on duty.

A.On
B.In
C.At
D.During

单项选择题（）should you do first when heaving up the anchor.

A.Engage the wildcat
B.Release the brake
C.Release the pawl
D.Engage the motor

单项选择题（）ready for mooring.

A.Do
B.Have
C.Make
D.Get