單項選擇題

（）, the repair in so short a time is unknown to us.

A.How they finished
B.How did they finished
C.That how they finished
D.That how did they finished

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單項選擇題

Which of the following represents the maximum percent of oxygen by volume required to be achieved by a ship’s inert gas system, prior to the commencement of crude oil tank washing?（）

A.6%
B.8%
C.10%
D.12%

單項選擇題

The fire of burning paper is classified as（）fire.

A.Class A
B.Class B
C.Class C
D.Class D