單項選擇題（）will reduce the visibility.

A.dust
B.sea water
C.land sand
D.wind


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1.單項選擇題（）view of the fact，I wish to submit this report.

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

2.單項選擇題（）using the derrick at once，the gooseneck is bent.

A.Continue
B.Start
C.Commence
D.Stop

3.單項選擇題（）this the Chief Officer agreed not to put any remarks.

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

4.單項選擇題（）there danger of explosion?

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

5.單項選擇題（）the whole the stowage is all right.

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