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必修4《Using LanguageⅠ》集体备课PPT课件优质课下载
big and beautiful
fresher,
healthier,
taste better
to improve the output of the crops
fertilizer
herbicide pesticide
natural fertilizer
from
animal waste
chemical fertilizer
How many kinds of fertilizers do farmers use?
Which kind do farmers use when they are doing organic farming?
Chemical or Organic Farming?
D. Long-term use of chemical fertilizers
can cause damage to the land and
people’s health.
B. Farmers and customers turn to
organic farming.
C. Other methods to keep the soil fertile.
Step 2 Reading
4m
A. Problems caused by chemical fertilizers.
Task 1 Skim the passage and match the main idea with each paragraph.
P1.