1) The black cat sat on a mat and ate a fat rat.

2) Betty Botta bought some butter, But she said, this butter's bitter. But a bit of better butter will make my batter better.

3) She sells seashells on the seashore, the shells that she sells are seashells, I'm sure.

4) A big black bug bit a big black bear, A big black bear bit a big black bug.

5) Thirty-three thousand people think that Thursday is their thirtieth birthday.

6) What noise annoys an oyster most? A noisy noise annoys an oyster most.

7) Ripe white wheat reapers reap ripe white wheat right.

8) Blake's black bike's back brake bracket block broke.

9) Each Easter Eddie eats eighty Easter eggs.

10) She slits the sheet she sits on.

11) A rough-coated, dough-faced, thoughtful ploughman strode through the streets of Scarborough; after falling into a slough, he coughed and hiccoughed.

12) A twister of twists once twisted a twist. and the twist that he twisted was a three twisted twist. Now in twisting this twist, if a twist should untwist, would the twist that untwisted untwist the twists.