課文朗讀英文字幕    課文朗讀中英文字幕    課文朗讀無字幕 
Quizlet Set 1, Set 2
Lesson 3 Do Animals Sleep like You and Me? 
Lesson 4 Sniffing Out More Than Just Bones 
Lesson 5 The Life of a Plastic Bag 
Lesson 6 Built for Freedom: The Statue of Liberty 
Lesson 7 The White Envelope 
Lesson 8 Convenience Store: Where Our Wallets Are Always Open 
Lesson 9 Fighting for or against Graffiti