UNIT 01 Lung

　　How many lungs do we have? We have two lungs in our body. Lungs are protected by ribs. They are very big. They are about two times as large as one of our feet. They take in oxygen from the air and put it into our blood. We need oxygen to live. If you want your lungs to be strong, you’d better drink a lot of water。

　　Select True or False

　　❶ Lungs are protected by hearts. (T/F)

　　❷ People breathe oxygen. (T/F)

　　❸ People have one lung in their body. (T/F)

　　More to know

　　had better

　　had better有“最好”的意思。如you had better eat是“你最好吃点”的意思 。

　　··I had better study more。

　　我最好多学点。

　　··We had better be quiet。

　　我们最好安静点。

　　READING COMPREHENSION

　　*Read and circle the best answer。

　　❶ How many lungs do people have?

　　a. one b. two c. three

　　❷ Which protects lungs in our body?

　　a. ribs b. hearts c. stomach

　　*Complete the sentence with the right answer。

　　❸ Lungs are very big and they are about times the size of

　　our foot。

　　a. two b. four c. six

　　❹ Lungs take in from the air and put it into our blood。

　　a. hydrogen b. oxygen c. dioxide

　　DESCRIBE THE PICTURE

　　*Unscramble the words in the box。

　　people drinking water Many are

　　很多人在喝水