单项选择题
The sailors （）are making preparations for mooring.
A. on the bridge B. at the stern C. in the cabin D. in the engine room
单项选择题 Two tugs are helping the ship. One is pulling from forward, the other is （）.
单项选择题 The ship is （）at the wharf slowly.
单项选择题 The ship is to （）to buoys.
