●Unit One Who Is More Sympathetic? Unit Two Diamond Unit Three Bill Gates Unit Four Ford Unit Five Global Warming Unit Six Bear Unit Seven Three Gorges Dam Unit Eight Chengdu Unit Nine Hurricane Unit Ten Human Brains Unit Eleven Traditional Fishing Unit Twelve Titanic Keys for Unit One Keys for Unit Two Keys for Unit Three Keys for Unit Four Keys for Unit Five Keys for Unit Six Keys for Unit Seven Keys for Unit Eight Keys for Unit Nine Keys for Unit Ten Keys for Unit Eleven Keys for Unit Twelve Cripts for TV Episodes 後記