2. Look at the pictures of rainbows and discuss how many colours there are in a rainbow.
1. Discuss the questions about a rainbow.
Q: Have you ever seen a rainbow?
Q: When does a rainbow appear?
3. Remind students of different colours.(Give some pictures about colours to help the students.)
Step2, Welcome to the unit
2. Q: How many colours are there in the Olympic rings?
A: Five.
Q: What are they?
A: blue, black, red, yellow, green.
1. This summer, the 29th Olympic Games were held in Beijing. Show some pictures about the 29th Olympic Games/rings. (奥运盛会一下子就会激发学生的兴趣，但是也要防止部分学生兴奋过度，所以相关图片请根据班级情况略做调整.)
4. Can you give some advice to the government?
2 Read and understand
Please choose the proper words to fill in the blanks.
none nobody others anything other
something everyone everybody everywhere anybody
Dear Headmaster,
I’m writing to tell you 1 important. 2 likes to be untidy, however, some students throw waste paper and bottles 3 .We all need a quiet place to study, but some students often make too much noise at school. Even worse, some of them are quite rude when talking to 4 .
5 knows their behavior is bad, but 6 of us knows how to stop them.
I think we should make rules to change the situation. Perhaps it will be hard for us to keep the rules in the beginning, but if 7 does their best to follow the rules, our school will become better and better day by day.
Sincerely,
Kangkang
3 Work alone
Listen to the tape and number the following sentences in the correct order.
( ) a. In the past, people killed animals for their meat and skin.
( ) b. We should do our best to protect animals.
( ) c. Some people destroy the environment where animals live.
( ) d. Some animals are even in danger of disappearing completely.
( ) e.Humans have come to realize the importance of protecting animals.
3. What should students do and not do to protect the environment?
2. Why is air pollution a serious problem in China?
1. What are they talking about?
2. Homework:
Write an article about the changes because of pollution.