读一读,选择适当的句子完成对话
A.We should do our best every day.
B.It's World Earth Day!
C.What's the date today?
D.That's a good idea.
Kitty:Hi,Peter.
Peter:Let me look at the calendar.Oh,it's 22nd April.
Kitty:Wow!
Peter:World Earth Day? I don't know before.What's that?
Kitty:It is to encourage people to save the Earth.
Peter:Oh! You mean we should do something to keep the Earth clean and healthy on this day.
Kitty:Yes,but not only one day.
Peter:I think so.Let's do something after school today.
Kitty:Yes.
Peter:See you then.
Kitty:See you!