单项选择题
欢迎你再到我们船上来。（）
A. You are welcome to look around our ship.. B. You are welcome to have a look our ship. C. You are welcome to come on board our ship again. D. You are welcome to visit our ship.
单项选择题 日出升国旗。（）
单项选择题 及时调整缆绳。（）
单项选择题 大副现在有空。（）
