1. 03 级外语系本科五班 柯厚媛 Colored plants can help health (s1-6a)

2. Which of the following do you like? And why? Pre reading

3. According to the story, what have the scientists discovered? While reading Coloring can protect the plants from chemical damage.

4. 2. How does Ultraviolet light cause chemical damage to plants? If those chemicals move through plant cells without being changed or destroyed, they can damage the cells.

5. Analysis : Fact, cause and effect A plant’s coloring can protect it from chemical damage. Fact :________________________________. Plant make antioxidants to protect them from the Sun’s Ultraviolet light. Typically, dark colored plants have more antioxidants than do paler ones. Ultraviolet light caused bad chemicals to form within plant cells. Cause : 1._____________________________ ______________________________________. 2.______________________________________ ______________________________________. Effect: _______________________________________ ______________________________________.

6. Colorful fruit and vegetables protect people. If you breathe polluted air, you take in chemicals that also cause this type of damage. antioxidants stop the chemical damage. Fact:______________________________ __________________________________. Cause:1. __________________________ 2. ________________________________. Effect: _____________________________ ___________________________________. eating a variety of colorful fruits and vegetables means taking in antioxidants. Cause : 1._____________________________ ______________________________________. 2.______________________________________ ______________________________________. Effect: _______________________________________. Fact :________________________________.

7. fill in the blanks to give a conclusion. animalssunlightplantshuman beings UV lightantioxidantsnatural defenses stop the bad chemicals on their way and protect cells from harm. eat a variety of colorful fruits and vegetables to take in antioxidants.

8. Grammar and sentence patterns. 1. Even the fruits and vegetables you eat have different colors. (Para 1) 2. The good news for us is that when we eat colorful fruits and vegetables, the coloring protects us too. ( Para 3) _______________________________ ^ that 这是一个 _________________ 从句. 定语 _________________ ___________________________________ 这是一个 that 引导的 ____________ 中套入一个 ____________ 从句. 表语从句时间状语

9. Find out suitable usages from the passage and try to complete the sentences. 1. The whole class is _____ of laughter as my partner jokes. 2. A head teacher is_______ for a whole class. 3. The colorings of the fruits can _______ us from chemical damage. 4. The red roses, standing out against the green leaves, draw my ______. full responsible protect attention

10. 5. His carelessness in driving ______ him to lose his life. 6. He left the classroom _____ telling anyone. 7. The new semester is ___ its way, are you ready for it? 8. Smoking does _____ to our health, but drinking some wine is good ___ us. 9. Go to the beach and you can ____ in fresh air. 10. We’d better build up our national ______ to protect against our enemies. caused without on for take defenses harm

11. Consolidation Choose the best answer. 1. If we want to build up our immune systems, we’d better have more _____ colored fruits and vegetables. A. darkB. rich C. deep D. all the above 2. Besides ultraviolet light, ____ is another source of chemicals which do harm to us. A. antioxidantsB. polluted air C. paler plantsD. sunscreen √ √

12. 3. We’d better take in antioxidants as we get older to ________. A. have strong defenses against diseases B. enjoy more delicious & colorful fruits C. help build up sunscreen D. make up vitamins in our bodies 4. we may conclude the reason that nature is so colorful is ___________. A. human selection B. natural selection C. it’s hard to say D. protection and prevention √ √

13. Which of the following are more useful to keep health? And which of not that useful ? Arrange them in right column.. Post reading 1.__________________________ 2. _________________________

14. Remember: You are what you eat!