At sea, much of the sailor’s time is spent （）the ship and keeping her equipment in good condition.<br>A:to maintain<br>B:maintaining<br>C:maintenance<br>D:maintain

At sea, much of the sailor’s time is spent （）the ship and keeping her equipment in good condition.
A:to maintain
B:maintaining
C:maintenance
D:maintain

出自：船舶水手证

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