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必修4《Using LanguageⅠ》PPT课件优质课下载
Third , we sow the seeds in the soil.
Finally, we can harvest our crops.
fertilize the soil
to increase production of the crops
fertilizer
fertilizer
How many kinds of fertilizers do farmers use?
chemical fertilizers natural fertilizers
chemical farming organic farming
chemical fertilizers natural fertilizers
Better？
Chemical Or Organic Farming?
Task1 Listening
1. Listen to the tape and find out what's the main idea of the whole passage.
Chemical fertilizers can cause ____________, so _____________ is becoming more popular.
many problems
organic farming
2. What's the style of this reading passage?
A. narration （记叙文）
B. argumentation （议论文）
C. exposition （说明文）
Task 2 Fast reading
Find out the topic sentence and the main idea of each paragraph.
说明文文体,其主题句经常出现__________.
如有 therefore, thus, but, however, in short等转折词，____往往就是主题句；