单项选择题
“Ease the strain on the stern line” means “（）”!
A. Heave away the stern line. B. Take in the stern line. C. Slack the stern line. D. Heave in the stern line.
单项选择题 （） the head line!
单项选择题 Take tug’s towing line on （）.
单项选择题 Make fast on （）quarter.
