阅读P38－39的教材原文，选择最佳答案

　　1．What environmental problems does the Yangtze River have?

　　A．The waste being put back into the river is increasing.

　　B．The water is unsafe to drink.

　　C．The waste in the river endangers the fish and wildlife living in or along the river.

　　D．All of the above.

　　2．Which of the following doesn't belong to the things that the organizations and projects do to protect the Yangtze River?

　　A．Educating and advising people on the importance of protecting the river.

　　B．Watching the river and stopping the illegal hunting of animals.

　　C．Assessing the river and trying to work out possible solutions to many problems.

　　D．Replacing the crops on the farmland with trees and grassland.

　　3．Which of the following statements about the Yangtze River is TRUE?

　　A．We still have to do many things to protect the Yangtze River.

　　B．All people have realized the importance of protecting the Yangtze River.

　　C．The environmental situation of the Yangtze River has improved well.

　　D．Only the people who have worked for the protection can appreciate our work.

　　4．To help decrease carbon gases，one should ．

　　A．not travel long distance

　　B．never travel alone

　　C．always walk or ride a bike

　　D．use as little energy as possible

　　5．What is the best way to use energy?

　　A．Never turning on the lights.

B．Recycling.