先前知識 (Prior knowledge is a major component of schema theories of reading comprehension...
Prior to adopting these five children in Taiwan, they have already...and Korea. 2009-12-15 11:39:37 補充： You are right! (prior to...) clearly states that the event took place in the past. My...
Prior to yesterday’s talks, North Korea had suspended... to protest joint US-south Korean military maneuvers.prior to ~在...之前(介系詞片語)had suspended 過去完成式to protest...