Unit 2 Retention and RetellingI.Listen to the sentences and then retellthe exact meaning in source language(Chinese)of what you have heardbased on your retention.You are notallowed to take notes while listening.每年的4月1日是西方也是美国的民间传统节日-愚人节,其实愚人节起源于欧洲的法国,后经英国传入美国。