【单选题】
When Americans take a break, they often head()their favorite vacation place.
A、into
B、onto
C、over
D、for
A、into
B、onto
C、over
D、for
A、When the two vessels are less than half a mile from each other B、When the give-way vessel is not taking appropriate action to avoid collision C、When collision is imminent D、The stand-on vessel is never allowed to take action
A、At any time you feel it is appropriate B、Only when you have reached extremis C、When you determine that your present course will cross ahead of the other vessel D、When it becomes apparent to you that the give-way vessel is not taking appropriate action