单项选择题
The majority of cargo gear breakdowns are a result of（）.
A.Guy failures
B.Topping lift failures
C.Bending of the boom from compression
D.Gooseneck failure
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The inability to supply a cargo of the contractual quantity in the country of shipment（）the doctrine of frustration into operation.
A.is capable of bringing
B.is sufficient to bring
C.is not capable of bringing
D.is probally to bring -
单项选择题
The full utilization of berths can be achieved if（）.
A.ships arrive at random
B.cargo-handling time varies greatly
C.ships have to queue to get onto berths
D.ships do not have to wait to get onto berths -
单项选择题
The foreman says that the stevedores stopped working owing to the（）of the winch.
A.breakdown
B.breaked down
C.broken down
D.broke down
