人教 版英语必修4 Unit 2 Working the land Reading and Listening 课件（共16张PPT）

课件16张PPT。Unit 2
Using language
Reading and Listening
Can you think of other ways to
increase the output of the crops?________the crop________the soilget rid of the_______kill off the ________waterweedsfertilize pestsHow many kinds of fertilizers do farmers use?
There are two kinds. Chemical fertilizers Natural fertilizersNatural waste from animals Chemical farmingOrganic farming chemical fertilizers
natural fertilizers
Which one is better? Why? Chemical or Organic Farming?Long-term use of chemical fertilizers can
cause damage to the land and people’s health.Problems caused by chemical fertilizers.The topic sentence (主题句) of each paragraphPara.1Para.2Farmers and customers turn to organic
farming.Other methods to keep the soil fertile. Para.3Para.4Fast ReadingPara.1 Answer the question1. Why are chemical fertilizers so popular
in farming today?
Because they can stop crop disease and increase production.Careful Reading2. What problems can be caused by using chemical fertilizers? They can ________________by killing the
helpful________________.
________________ in people’s bodies and
can_________ cancer or other illnesses.
Fruit, vegetables and other food grow
________________________.Para.2 Answer the questiondamage the landbacteria and peststoo fast to be full of nutritionChemicals build uplead toWhich is Not the reason why organic farmers
choose natural waste from animals as fertilizers?
_________
A. It can keep the air, soil and water free from
chemicals.
B. It can keep the food free from chemicals.
C. It can kill harmful pests.
D. It can make the soil richer in mineral.CPara. 3 Choose the right answerPara. 4 Match different methods with their advantages
1. plant grass
between crops
2. change the kind of crop
3.plant crops with different roots
put minerals back into soil, making the soil rich and healthy
use different levels
of land
C. prevent the soil from being carried away, a natural fertilizerMethodAdvantage1. Paul thinks that Carrie is not telling him the truth.
2. Using chemical fertilizers always makes vegetables
empty inside.
3. Today’s fruit is not as healthy for people as fruit fifty
years ago.
4. Eating more vegetables might not always be good for us.
5. All of today’s vegetables look healthy but in fact are not.
Decide if the following statements are true or false.
ListeningJunk food 1. Read the text again and underline the difficult
points of the reading text.
2. Finish the exercises from P. 28 to P. 29 on the
reference book（新新学案） HomeworkThank You!