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單項(xiàng)選擇題

The ship should be operated by a company which is issued a(an)（）relevant to ship.

A.ISM
B.DOC
C.SMC
D.PSC

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單項(xiàng)選擇題

Christopher Columbus （） eighteen years （） planning for that wonderful voyage which he made across the Atlantic Ocean.

A.spends；in
B.spent；on
C.has spent；on
D.had spent；in

單項(xiàng)選擇題

Water can’t be used to put out fires of （）

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

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