(11)The rat-catcher can't catch caught rats.

　　(12)Six silly sisters sell silk to six sickly senior citizens.

　　(13)Ten tiny tortoises tried to talk to twenty timid toads.

　　(14)How many cuckoos could a good cook cook if a cook could cook cuckoos?

　　(15)Three thumping tigers are tickling trout.

　　(16)Sheep shouldn't sleep in shaky shacks, should they?

　　(17)A spoiled boy destroyed a toy for joy.

　　(18)Nick had a big pig with thick sticky skin.

　　(19)Cat, cat, catch that fat rat!

　　(20)Some say sweet-scented shaving soap soothes sore skin.