5.　　 A leaking toilet can waste twenty to forty litres of water an hour. (　 )

4.　　 On a no-car day, only teachers come to school by car. No students come to school by car. (　 )

3.　　 They give prizes to the classes that make the least garbage. (　 )

2.　　 Environment clubs encourage students to bring their lunches in plastic bags. (　 )

1.　　 In North America, many students help their school make more pollution. (　 )

　 Ⅰ、Listen two times and answer these questions:

　 1. Why do the students join “environment clubs”?

2. What do students in North America do to stop pollution?

　 Ⅱ、Read the text and answer true(T) or false(F):

2、　　　　　 会就环境问题表达自己的看法。认识到要保护我们周围的环境。

1、　　　　　 　掌握这些单词和短语: little-less-least　 leaking leaky　

throw away　 take out　 leak out　 turn off　 make pollution

3、　　　　　 了解环境污染的严重性，认识到要保护我们周围的环境。

2、　　　　　 能听懂有关环境问题的文章，会就环境问题表达自己的看法。