waited.

hoped for.

wanted.

longed for.

expected.

moreover.

furthermore.

since.

despite.

though.

randomly rotated images.

images for human faces.

squiggly letters and numbers.

fraudsters and their automated programs.

troublesome images.

Sites Unable to Block Fraudster Abuse.

Puzzles and Images for Machine Enhancement.

Fraudsters Wreak Havoc in Web Sites.

New Puzzles that Tell Humans from Machines.

Captchas Have Come to Save Rogue Programs.

human faces.

images easily handled by humans.

upside down digitized texts.

randomly selected images.

machine-readable texts or images.

human interpretation of troublesome text.

farming out text deciphered by humans.

digitizing mass scanning projects in archives.

human recognition of images in mass media.

improving automatic character recognition.

good.

best.

better.

worse.

worst.

India, China and Argentina.

India.

China.

India and China.

Argentina.

confirmação.

sugestão.

probabilidade.

necessidade.

alerta.

believes that due to the failure of the Doha round of talks the world will be in greater need of food.

is exhilarated by the outcome of the Doha round of talks.

was frustrated because he only played a minor role in the Doha round of talks.

had a bad hangover during a party at the Doha round of talks.

failed to grant Brazilian farmers the customs protection developed countries enjoy.