Topic 1 Polluti on has caused too many problems.
Section A
一、学习目标：
1、会正确使用一般过去时与现在完成时，了解两种时态的区别。
2、掌握以下生词、短语：bee, butterfly, moss, shame, several, pour, stream, bamboo, What a mess! What a shame, pour…into…
3、了解污染，要学会保护环境。
二、自主预习：
Task 1：用动词的正确时态填空：
1、I __________(see) the film last week. It __________(be) interesting.
2、I __________ ever __________(see) the film. I don’t want to go to day.
3、My father __________(be) a teacher twenty years ago. But now he __________(be ) an office worker.
4、My father __________(be) a teacher for twenty years. His students like him very much.
5、—I __________(call) you yesterday evening.
—Sorry. I __________(be) in the shop with my mother.
