单项选择题
Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.
A.Speak English
B.Repair the unit
C.Speak Spanish
D.Send Morse code
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Although the parties are entitled to make their contract in any manner that they like，it is usual for them to adopt one of the standard forms and then（）it as they think fit.
A.amend
B.repair
C.improve
D.clear -
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All removals to be reassembled in order（）of repairs.
A.upon commencement
B.on completion
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A.faying
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