(21)Big blue balloons bounced by Billy's brown bike.

　　(22)Five fine funny frogs frowned on furry furniture.

　　(23)The nurses in skirts washed thirty dirty shirts.

　　(24)If a chow chews shoes, how does he choose which shoes to chew?

　　(25)Little Willie's wooden whistle wouldn't whistle.

　　(26)Better beat a bit of butter to make a better batter.

　　(27)Lots of little London Lamplighters light London's lots of little lamps.

　　(28)Shadows shade the sheltered shallows.

　　(29)His shirt soon shrank in the suds.

　　(30)As the roaring rocket rose, the restless roosters rollicked.