David: What are you doing, Simon?
Simon: I'm making a poster.
David: What is Earth Day?
Simon:
David: That's wonderful!
Simon: We can make a poster together. We can tell people to save the Earth.
Simon: Yes! I'm good at drawing.
David: Good idea. Where do we put this poster?
Simon: We can put it in the classroom. Every student can see it on Earth Day.
A．What can I do?
B．It's for Earth Day.
C．I can draw some signs on the poster.
D．They should stop cutting down trees.
E．On Earth Day, people work together to keep the Earth clean and healthy.
