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树枝
例如
由…制成
根
[?'genst]
方便的
确切的说
氧气
家具
与…作斗争
大量的，数以百万计的
想象
生产，产生
1
In this unit, we are going to talk about another man’s best friends on Earth: ?
trees.
Background knowledge
How much do you know about trees?
Try the short quiz below.
fruit
branch
leaf
root
Lead-in : A quiz about trees
2
1. How tall can a tree grow? –-
2. How tall is the tallest tree in the world?---
3. How many kinds of trees are there in the world? ---
4. How to know a tree’s age? ---
5.How can trees tell us the direction?--