A.ContinueB.StartC.CommenceD.Stop（）using the derrick at……

单项选择题（）this the Chief Officer agreed not to put any remarks.

A.At
B.By
C.For
D.Upon

单项选择题（）there danger of explosion?

A.Is
B.Has
C.If
D.Do

单项选择题（）the whole the stowage is all right.

A.In
B.On
C.From
D.To

单项选择题（）the time of collision，the 3rd officer was on the bridge．

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

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

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