Two girls are good friends. They are talking.
Lily: Oh, my bag is heavy.
Mary: What's in your bag?
Lily: Look! Ten storybooks, two pencils, one eraser, three Chinese books and four English books.
Mary: Wow! That's really heavy.
Lily: What about your bag?
Mary: Look! A storybook, a pencil, a ruler, an eraser and a maths book.
Lily: Oh, your bag is very light.
B . 
C . 
