The plan __________just because people were unwilling to cooperate (合作).
Mr. Smith would have come to see you if it had been possible, but he __________ so busy.
--- Could you tell me what he said just now? --- Sorry, I ______ what was going on outside.
The unemployment rate in this district from 6% to 5% in the past two years.
Cathy is taking notes of the grammatical rules in class at Sunshine School,where she English now.
His silence at the meeting suggested that he _________ with you.