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brave adj.勇敢的 chain n.链条
balance n.平衡 reason n. 原因
disappear v.消失 kill v.杀死
cut v. 砍，切
decrease v.使…减少
New phrases:
at the beginning of 在…之初
drop to 下降至，跌至
food chain 食物链
in balance 保持平衡
in danger 处于危险之中
cut down 把…坎倒
as well 还，也
be important to 对…重要
Listen and answer:
What is the" Save the tigers”？
Read the text in groups and discuss：
Group1:What do tigers look like?
Group2:why do we save the tigers?
Group3: How can we save the tigers?
the number of ……的数量+V单
a number of 许多，大量+V复
The number of students in our class_____ 40.
A number of students _____ Chinese.
2.be important to 对……重要
时间对我们很重要。
Animals are our friends. My favourite animal is________ (animal’s name). It is _______(colours). It lives in the _______(forest/zoo/river…) and it looks_______（lovely/friendly/cute）.
But in recent years, the number of ______has dropped. We have to save them.
First, we can____________. Second, we should___________.……(build houses/cut down trees/kill them/plant trees……）
In a word, _________ are important to the environment. Let's protect them together.