Fill in the gaps.

1. Sales of PCs ... increased from 1984 to 2010. \(in a gradual and regular way\)
2. Smartphone sales ... PC sales in 2010. \(went past\)

3. There was a ... rise in smartphone sales between 2009 and 2015. \(sudden and dramatic\)

4. PC sales ... in 2010. \(reached their highest point\)
5. Smartphone sales continued to grow ... from 2010 to 2013. \(suddenly and obviously\)

6. In ... , PC sales started a slow decline around the same time. \(on the other hand\)
7. PC sales ... as the popularity of the smartphone grew. \(got smaller\)
8. Smartphone sales ... in five years, then continued to increase dramatically. \(became twice as many\)