21.—Mum, where did you put my new MP3?

—I put it in ________ yellow box under your desk.

A. a     B. an     C. the     D. 不填

22. —Whose book is this? Is this yours?

— No, it’s ________.

A. her      B. she      C. my     D. hers

23. You have just read this newspaper. Did you find_______ in it?

A. interesting anything          

B. anything interesting

C. interesting something         

D. something interesting