单项选择题
“Single up forward to headline and spring!” means “ （）”.
A. Unmoor all lines except the headline and forward spring. B. Moor all lines except the headline and forward spring. C. Hold on all lines except the headline and forward spring. D. Let go the headline and forward spring.
单项选择题 A head line leads forward from（）to shore.
单项选择题 Turn on the （）at night.
单项选择题 My ship is going to （）at a container terminal.
