They do this so the Polish smugglers won't be able to understand them. This was a good idea, particularly for the Jews relying on Yiddish language, in order to convey secrets among themselves. The Jews have no trust to the smugglers in front of them, and so they use the language to have an advantage.
<em>Historical Background</em>
The history of the Jews in Poland dates back over 1,000 years. Many children were smuggled to Poland, where the conscription of Jews did not take effect until 1844.
Jacques Marquette explore Mississippi
The correct answer is Franklin Roosevelt
The remnants of dozens of mammoths whose furs, tissues and internal organs were preserved intact for thousands of years in the ice and permafrost of Siberia have been examined by scientists who autopsied the bodies determined that many of these animals died suddenly as a result of fatal falls into crevices and holes hidden in the terrain. Other are believed to have died during violent blizzards that got the mammoths into a state of hypothermia very quickly.