填空题

填空题 Bicycle sales hardly changed throughout the period, except for a slight fall in 1998.

填空题 A steady increase in the sale of bicycles during 1999 and 2000 followed a sharp decrease in 1998.

填空题 After a sharp rise, there was no change in bicycle sales for the rest of the period.

填空题 Bicycle sales decreased steadily from 1998 to 2000.

填空题 Bicycle sales fell in 1999 but rose again in 2000 to be at the same leval as in 1998.