If you understand , say ''understand''. If you don't understand, say ''don't understand''.But if you understand and say ''don't understand''. how do I understand that you understand . Understand?
如果你知道就说“知道”， 如果你不知道就说“不知道”；如果你知道却说“不知道”， 我怎么知道你知道，知道吗？
Betty bought a cunning stunning stunt kite.
Billy Smith's fish-sauce shop seldom sells shellfish.
Bake big batches of bitter brown bread.
Bobby Bippy bought a bat.Bobby Bippy bought a ball.
With his bat Bob banged the ball.
Banged it bump against the wall.
But so boldly Bobby banged it.
That he burst his rubber ball.
"Boo!" cried Bobby.
Bad luck ball ,Bad luck Bobby, bad luck ball.
Now to drown his many troubles.
Bobby Bippy's blowing bubbles.
A twister of twists once twisted a twist.
Ann and Andy's anniversary is in April.
A loyal warrior will rarely worry why we rule.
A big black bug bit a big black bear. Where's the big black bear the big black bug bit?
There was a fisherman named Fisher who fished for some fish in a fissure。
Till a fish with a grin,pulled the fisherman in. Now they're fishing in the fissure for Fisher。
I know. You know. I know that you know. I know that you know that I know.
Mike likes to write by the nice bright light at night.
The man with fair hair dare not repair their chairs there because there is a bear there.
Good cookies could be cooked by a good cook if a good cook could cook good cookies.
She sells sea shlls on the seashore .The seashells she sells are seashells ,she is sure.
A bitter biting bittern bit a better brother bittern, and the bitter better bittern bit the bitter bittern back. And the bitter bittern, bitten, by the better bitten bittern, said: “I’m a bitter biter bit, alack!
How much wood would a woodchuck chuck if a woodchuck could chuck wood?
Ann sent Andy ten hens and Andy sent Ann ten pens。
Canners can can what they can can but can not can things can't be canned。
Good cookies could be cooked by a good cook if a good cook could cook good cookies。
Jenny and Jimmy went to Jamaica and Germany in January, but Joan and John went to Jordan and Japan in June and July。
A cricket critically cricked at a critical cricket match, and so this cricket quitted the cricket match quickly。
Bill's big brother is building a beautiful building between two big brick blocks
A flea and a fly were trapped in a flue, and they tried to flee for their life. The flea said to the fly "let''s flee!" and the fly said to the flea"Let's fly!.Finally both the flea and fly managed to flee through a flaw in the flue。
Peter Piper picked a peck of picket prepared by his parents and put them in a big paper plate。
There are thirty thousand feathers on that thrush's throat。
How many cookies could a good cook cook if a good cook could cook cookies? A good cook could cook as much cookies as a good cook who could cook cookies.
Sandy sniffed sweet smelling sunflower seeds while sitting beside a swift stream。
A skunk sat on a stump. The skunk thought the stump stunk, and the stump thought the skunk stunk。
A snow-white swan swam swiftly to catch a slowly-swimming snake in a lake。