單項選擇題The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.
A.displacement
B.fumigation
C.discharging
D.compensation
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1.單項選擇題The equipment is very old. It’s not worth（）.
A.repairing
B.to repair
C.repair
D.to be repaired
2.單項選擇題The expenses for such work done by stevedores are（）shipowners’（）.
A.for, account
B.to, payment
C.on, account
D.with, payment
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