單項選擇題()there danger of explosion?

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


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

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

4.單項選擇題()the packing is the same,the lots are different in marks.

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

5.單項選擇題()the morning from 0800 to 1200 Chief Officer is on duty.

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