单项选择题
We have to()(前移)one metre.
A. shift ahead B .shift head C. move forward D. shift forward
单项选择题 ()(班轮)sail on regular routes.
单项选择题 Pass the spring round()(卷筒),and then heave away easy.
单项选择题 ()(不定期船)run in all parts of the world.