单项选择题
It is no （） arguing about this problem, because our agent will never change his mind.
A.help B.good C.use D.worth
单项选择题 I am sorry （） waiting for a long time.
单项选择题 By this time tomorrow, the ship （）its repair work in the engine room.
单项选择题 I would have gone ashore with the second engineer, if I （） time.
