一、听录音,写出你所听到的单词。

1.should　2.shouldn’t　3.waste　4.blouse　5.enough　6.save　7.drop　8.fresh

二、听录音,补全你所听到的短语。

1.keep the rivers clean　2.keep the air clean and fresh　3.plant more trees 　4.use bikes instead of cars　5.shouldn’t kill wild animals 　6.shouldn’t waste water

三、听录音,补全你所听到的句子。

1.We should plant more trees.　2.We should keep the rivers clean.　3.We should keep the air clean and fresh.　4.We should plant more trees.　5.We should use bikes instead of cars.