【正文】
ese? A. 粘住 B. 扔掉 C. 撿起 D. 浪費(fèi) B ( Grammar Focus4c) A ( )4. The main cause of pollution is ______ according to the passage. A. littering B. spitting C. bad habits D. rubbish D ( Grammar Focus4c) ( )5. The main idea of the passage is ______. A. we should cut down waste and give up bad habits to save the earth B. removing chewing gum is really hard work C. rubbish makes our soil, our water and our air dirty D. trucks of rubbish can circle the world five times A ( Grammar Focus4c) ( Grammar Focus4c) ●難點(diǎn)釋疑 ① be thrown out 被扔掉。 如: Rubbish is thrown out everywhere in the park. 公園里垃圾被扔得到處都是。如: Believe it or not, I got the first prize in the singing contest. 我獲得了歌唱比賽的第一名,信不信由你。 如: I ride a bike to school instead of taking a car. 我踩單車去學(xué)校而不是坐