اللغة الانجليزية 
How to care for planet
Watch the video and answer the questions:
What is waste?
What waste becomes the part of the earth?
Active vocabulary
Exercise 9.1 Saving The Planet
Exercise 9.2 Saving our planet
Grammar
Exercise 9.3 Present Perfect Simple vs. Past Simple
Exercise 9.4 Plurals of nouns Revision
Questions for discussion
Exercise 9.5