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單項選擇題

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

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單項選擇題

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

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

單項選擇題

（）means the person designated as responsible for the development, implementation, revision and maintenance of the port facility security plan and for liaison with the ship security officers and company security officers.

A.Ship security officer
B.Company security officer
C.Port facility security officer
D.PSC officer

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