The officer in charge of the engineering watch shall continue to be responsible for machinery operations, （）the presence of the chief engineer in the machinery space.<br>A:as long as<br>B:unless<br>C:despite<br>D:till

The officer in charge of the engineering watch shall continue to be responsible for machinery operations, （）the presence of the chief engineer in the machinery space.
A:as long as
B:unless
C:despite
D:till

出自：海船船员证

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