单项选择题
I am sorry () waiting for a long time.
A.to keeping you B.to kept you C.to have kept you D.kept you
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.
单项选择题 Please give us your quotations ()you receive the additional repair list.