[解析]
B C B C
W:You said a strange thing on our walk today.You said you love to see things rotting.I'm curious to know why you said that.
M:It's nothing to get excited about,but I'm happy to explain.Nature is so clever in the way it makes somethings rot away to nothing and then creates new life from what is left over.
W:But why did you mention it on our walk?We were in the forest at the time.
M:I saw some mushrooms growing on a fallen branch.They help recycle the deadwood,so that more trees and flowers can grow.It's a beautiful system.
W:Yes,nature is an expert recycler—and mushrooms can be as beautiful as flowers.Those little yellow ones were unusual—and do you remember the large orange ones?Best of all were the red ones.
M:I could look at things like that all day.The subject really interests me.We'll have to walk there again next Friday.
W:Thursday would be better for me.
M:I can't make it then.I have booked an appointment at the dentist's.What about Saturday?
W:It's a date.We'll explore the magic of mushrooms.