单项选择题
If the surveyors （）yesterday, they would have finished the survey work.
A.did not interrupt B.were not interrupted C.had not interrupted D.had not been interrupted
单项选择题 Our company has built a new ship in Hamburg and I am going to fly there to （）.
单项选择题 It is no （） arguing about this problem, because our agent will never change his mind.
单项选择题 I am sorry （） waiting for a long time.
