dolphin, a rare Chinese mammal which depends on the Yangtze River for survival.

a range of buildings 一排楼房

a range of pictures 一系列画片

a large range of motors for sale 一长排待售的汽车

a wide rage of temperature 气温变化很大

the range of the nightingale 夜莺的生长区

the annual range of temperature 每年的温度变化范围

a wide range of knowledge 广博的知识

the range of one's voice 音域

9. The second environmental project includes a nature reverse for white-flag dolphins, one of the most endangered animals in the world.

reverse 倒退；倒转

He reversed the car. 他倒车。

翻转 She reversed the paper.

她把纸翻过来。

改变；使成相反的东西 He reversed the judgment and set the prisoner free after all.

他撤销了原判，终于释放了囚犯。

10. Boats are prohibited from entering this area in order to keep the dolphins safe.

常与from连用）

prohibit 禁止；不准

Smoking is strictly prohibited in the process of handling explosive materials.

"在处理易爆物时,严格禁止吸烟。"

妨碍；阻止；使不可能

His small size prohibits his be coming a policeman.

他的个子太小使他无法当警察。

Step 5 writing

In this period, we have learned the problems about Yangtze river and know the causes and solutions. We should try our best to protect the river and our environment. Now can you write a report about Yangtze river since you have known the situations. Now work in groups and write a report.

Planning

Work in small groups. Discuss what you read on the previous page, briefly discuss the questions below and then decide on a topic for your report. Have it approved by your teacher.

What do you think are the biggest environmental problems in China?

What is the Chinese government doing to protect the environment?

The topic for our report will be _____________________________.

Discuss the tasks listed below and decide which group members will be responsible for each task. Write the names beside the work each member is going to do. ( Remember, two or three people can work on the same task!