Eli Cohen was sworn in as the newest Knesset Member yesterday, and immediately called upon Prime Minister Sharon to fight PLO terrorism more resolutely. Cohen, a resident of Maaleh Adumim, is the Likud\'s Judea-and-Samaria representative. He has served in the past as Mayor of Maaleh Adumim, Settlement Affairs Assistant to the Defense Minister, Chairman of the World Betar Council, and in other positions. Cohen replaced the Likud\'s Yehoshua Matza, who became Bonds Chairman in New York.