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For example ,paper pencils, and chairs.
2
本节课学习目标
（1）通过学习，了解文章主要内容；
（2）会简单描述树木的重要性；
（3）通过了解树木为人类所做的巨大贡献，树立保护树木的意识。
Background knowledge
How much do you know about trees?
Try the short quiz below.
fruit
branch
leaf
root
3
Pre-reading
Look at the title of the interview on page 45.
Then answer the question below.
4
While-reading
Trees in our daily lives
Rebecca wants to know more about trees and how they help us.
She is interviewing Dr Jones about trees.
Read the first part of the conversation and answer the following question.
Why are trees major fighters against air pollution?
Comprehension
They keep the air cool and clean.
They take in harmful gases from the air.
They produce oxygen for us to breathe.
Read the second part of the conversation and answer the following question.
What can we get from trees?